From ee764e56519f76a66799702ce5719f3aab6493de Mon Sep 17 00:00:00 2001
From: TheSola10 <me@thesola.io>
Date: Tue, 11 Mar 2025 13:48:53 +0100
Subject: [PATCH] Introduce sysctl health checks for sandboxed Nix

---
 nix             | 1446 +++++++++++++++++++++++++----------------------
 src/nix.ab      |    7 +-
 src/platform.ab |   34 ++
 3 files changed, 797 insertions(+), 690 deletions(-)

diff --git a/nix b/nix
index 93889f1..b5f2fca 100755
--- a/nix
+++ b/nix
@@ -111,16 +111,27 @@ fi
     __AF_file_exists33_v0=1;
     return 0
 }
+file_read__34_v0() {
+    local path=$1
+    __AMBER_VAL_6=$( < "${path}" );
+    __AS=$?;
+if [ $__AS != 0 ]; then
+__AF_file_read34_v0=''
+return $__AS
+fi;
+    __AF_file_read34_v0="${__AMBER_VAL_6}";
+    return 0
+}
 file_write__35_v0() {
     local path=$1
     local content=$2
-    __AMBER_VAL_6=$( echo "${content}" > "${path}" );
+    __AMBER_VAL_7=$( echo "${content}" > "${path}" );
     __AS=$?;
 if [ $__AS != 0 ]; then
 __AF_file_write35_v0=''
 return $__AS
 fi;
-    __AF_file_write35_v0="${__AMBER_VAL_6}";
+    __AF_file_write35_v0="${__AMBER_VAL_7}";
     return 0
 }
 dir_create__38_v0() {
@@ -155,13 +166,13 @@ fi
 }
 env_var_get__91_v0() {
     local name=$1
-    __AMBER_VAL_7=$( echo ${!name} );
+    __AMBER_VAL_8=$( echo ${!name} );
     __AS=$?;
 if [ $__AS != 0 ]; then
 __AF_env_var_get91_v0=''
 return $__AS
 fi;
-    __AF_env_var_get91_v0="${__AMBER_VAL_7}";
+    __AF_env_var_get91_v0="${__AMBER_VAL_8}";
     return 0
 }
 is_command__93_v0() {
@@ -185,18 +196,18 @@ printf__99_v0() {
 }
 echo_warning__108_v0() {
     local message=$1
-    __AMBER_ARRAY_8=("${message}");
+    __AMBER_ARRAY_9=("${message}");
     printf__99_v0 "\x1b[1;3;97;43m%s\x1b[0m
-" __AMBER_ARRAY_8[@];
+" __AMBER_ARRAY_9[@];
     __AF_printf99_v0__157_5="$__AF_printf99_v0";
     echo "$__AF_printf99_v0__157_5" > /dev/null 2>&1
 }
 echo_error__109_v0() {
     local message=$1
     local exit_code=$2
-    __AMBER_ARRAY_9=("${message}");
+    __AMBER_ARRAY_10=("${message}");
     printf__99_v0 "\x1b[1;3;97;41m%s\x1b[0m
-" __AMBER_ARRAY_9[@];
+" __AMBER_ARRAY_10[@];
     __AF_printf99_v0__162_5="$__AF_printf99_v0";
     echo "$__AF_printf99_v0__162_5" > /dev/null 2>&1
     if [ $(echo ${exit_code} '>' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
@@ -215,15 +226,15 @@ array_pop__119_v0() {
     __AMBER_LEN=("${!__AMBER_ARRAY_array}");
     local length="${#__AMBER_LEN[@]}"
     local index=$(echo ${length} '-' 1 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//')
-    eval "local __AMBER_ARRAY_GET_10_array=\"\${$array[${index}]}\"";
-    local element=$__AMBER_ARRAY_GET_10_array
-    local __SLICE_UPPER_12=${index};
-    local __SLICE_OFFSET_13=0;
-    __SLICE_OFFSET_13=$((__SLICE_OFFSET_13 > 0 ? __SLICE_OFFSET_13 : 0));
-    local __SLICE_LENGTH_14=$(eval "echo ${index} '-' $__SLICE_OFFSET_13 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//'");
-    __SLICE_LENGTH_14=$((__SLICE_LENGTH_14 > 0 ? __SLICE_LENGTH_14 : 0));
-    eval "local __AMBER_ARRAY_GET_11_array=\"\${$array[@]:$__SLICE_OFFSET_13:$__SLICE_LENGTH_14}\"";
-    eval "${array}=($__AMBER_ARRAY_GET_11_array)"
+    eval "local __AMBER_ARRAY_GET_11_array=\"\${$array[${index}]}\"";
+    local element=$__AMBER_ARRAY_GET_11_array
+    local __SLICE_UPPER_13=${index};
+    local __SLICE_OFFSET_14=0;
+    __SLICE_OFFSET_14=$((__SLICE_OFFSET_14 > 0 ? __SLICE_OFFSET_14 : 0));
+    local __SLICE_LENGTH_15=$(eval "echo ${index} '-' $__SLICE_OFFSET_14 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//'");
+    __SLICE_LENGTH_15=$((__SLICE_LENGTH_15 > 0 ? __SLICE_LENGTH_15 : 0));
+    eval "local __AMBER_ARRAY_GET_12_array=\"\${$array[@]:$__SLICE_OFFSET_14:$__SLICE_LENGTH_15}\"";
+    eval "${array}=($__AMBER_ARRAY_GET_12_array)"
     __AF_array_pop119_v0="${element}";
     return 0
 }
@@ -232,30 +243,30 @@ array_shift__120_v0() {
     local array=$1
     __AMBER_LEN=("${!__AMBER_ARRAY_array}");
     local length="${#__AMBER_LEN[@]}"
-    eval "local __AMBER_ARRAY_GET_15_array=\"\${$array[0]}\"";
-    local element=$__AMBER_ARRAY_GET_15_array
-    local __SLICE_UPPER_17=${length};
-    local __SLICE_OFFSET_18=1;
-    __SLICE_OFFSET_18=$((__SLICE_OFFSET_18 > 0 ? __SLICE_OFFSET_18 : 0));
-    local __SLICE_LENGTH_19=$(eval "echo ${length} '-' $__SLICE_OFFSET_18 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//'");
-    __SLICE_LENGTH_19=$((__SLICE_LENGTH_19 > 0 ? __SLICE_LENGTH_19 : 0));
-    eval "local __AMBER_ARRAY_GET_16_array=\"\${$array[@]:$__SLICE_OFFSET_18:$__SLICE_LENGTH_19}\"";
-    eval "${array}=($__AMBER_ARRAY_GET_16_array)"
+    eval "local __AMBER_ARRAY_GET_16_array=\"\${$array[0]}\"";
+    local element=$__AMBER_ARRAY_GET_16_array
+    local __SLICE_UPPER_18=${length};
+    local __SLICE_OFFSET_19=1;
+    __SLICE_OFFSET_19=$((__SLICE_OFFSET_19 > 0 ? __SLICE_OFFSET_19 : 0));
+    local __SLICE_LENGTH_20=$(eval "echo ${length} '-' $__SLICE_OFFSET_19 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//'");
+    __SLICE_LENGTH_20=$((__SLICE_LENGTH_20 > 0 ? __SLICE_LENGTH_20 : 0));
+    eval "local __AMBER_ARRAY_GET_17_array=\"\${$array[@]:$__SLICE_OFFSET_19:$__SLICE_LENGTH_20}\"";
+    eval "${array}=($__AMBER_ARRAY_GET_17_array)"
     __AF_array_shift120_v0="${element}";
     return 0
 }
-__AMBER_VAL_20=$(tput tsl);
+__AMBER_VAL_21=$(tput tsl);
 __AS=$?;
-__8_tsl="${__AMBER_VAL_20}"
-__AMBER_VAL_21=$(tput fsl);
+__8_tsl="${__AMBER_VAL_21}"
+__AMBER_VAL_22=$(tput fsl);
 __AS=$?;
-__9_fsl="${__AMBER_VAL_21}"
-__AMBER_VAL_22=$(tput smcup);
+__9_fsl="${__AMBER_VAL_22}"
+__AMBER_VAL_23=$(tput smcup);
 __AS=$?;
-__10_smcup="${__AMBER_VAL_22}"
-__AMBER_VAL_23=$(tput rmcup);
+__10_smcup="${__AMBER_VAL_23}"
+__AMBER_VAL_24=$(tput rmcup);
 __AS=$?;
-__11_rmcup="${__AMBER_VAL_23}"
+__11_rmcup="${__AMBER_VAL_24}"
 env_var_get__91_v0 "TERM";
 __AS=$?;
 __AF_env_var_get91_v0__13_18="${__AF_env_var_get91_v0}";
@@ -271,12 +282,12 @@ if [ $__AS != 0 ]; then
             TERM=xterm+sl tput hs;
             __AS=$?
             if [ $(echo $__AS '==' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-                __AMBER_VAL_24=$(TERM=xterm+sl tput tsl);
+                __AMBER_VAL_25=$(TERM=xterm+sl tput tsl);
                 __AS=$?;
-                __8_tsl="${__AMBER_VAL_24}"
-                __AMBER_VAL_25=$(TERM=xterm+sl tput fsl);
+                __8_tsl="${__AMBER_VAL_25}"
+                __AMBER_VAL_26=$(TERM=xterm+sl tput fsl);
                 __AS=$?;
-                __9_fsl="${__AMBER_VAL_25}"
+                __9_fsl="${__AMBER_VAL_26}"
 else
                 has_statusline=0
 fi
@@ -330,12 +341,12 @@ if [ "$__AF_text_contains14_v0__15_4" != 0 ]; then
         __AS=$?;
         __AF_env_var_get91_v0__17_25="${__AF_env_var_get91_v0}";
         PWD="${__AF_env_var_get91_v0__17_25}"
-        __AMBER_VAL_26=$(readlink ${__14_me});
+        __AMBER_VAL_27=$(readlink ${__14_me});
         __AS=$?;
 if [ $__AS != 0 ]; then
             __13_SELF="${PWD}/${__14_me}"
 fi;
-        rl="${__AMBER_VAL_26}"
+        rl="${__AMBER_VAL_27}"
         starts_with__20_v0 "${rl}" "/";
         __AF_starts_with20_v0__25_17="$__AF_starts_with20_v0";
         if [ $([ "_${rl}" != "_" ]; echo $?) != 0 ]; then
@@ -354,9 +365,9 @@ fi
 exists_newer__139_v0() {
     local left=$1
     local right=$2
-    __AMBER_VAL_27=$(stat -c %W ${left});
+    __AMBER_VAL_28=$(stat -c %W ${left});
     __AS=$?;
-    parse_number__12_v0 "${__AMBER_VAL_27}";
+    parse_number__12_v0 "${__AMBER_VAL_28}";
     __AS=$?;
 if [ $__AS != 0 ]; then
         __AF_exists_newer139_v0=0;
@@ -364,9 +375,9 @@ if [ $__AS != 0 ]; then
 fi;
     __AF_parse_number12_v0__37_21="$__AF_parse_number12_v0";
     local left_time="$__AF_parse_number12_v0__37_21"
-    __AMBER_VAL_28=$(stat -c %W ${right});
+    __AMBER_VAL_29=$(stat -c %W ${right});
     __AS=$?;
-    parse_number__12_v0 "${__AMBER_VAL_28}";
+    parse_number__12_v0 "${__AMBER_VAL_29}";
     __AS=$?;
 if [ $__AS != 0 ]; then
         __AF_exists_newer139_v0=0;
@@ -403,9 +414,9 @@ get_self__141_v0() {
     return 0
 }
 dump_archive__142_v0() {
-    __AMBER_VAL_29=$(mktemp -t nixie_XXXXXXXX.tar);
+    __AMBER_VAL_30=$(mktemp -t nixie_XXXXXXXX.tar);
     __AS=$?;
-    local dest="${__AMBER_VAL_29}"
+    local dest="${__AMBER_VAL_30}"
     cat ${__13_SELF} | (
         read -r M
         while ! [[ "$M" =~ ^-----BEGIN\ ARCHIVE\ SECTION----- ]]
@@ -434,7 +445,7 @@ untar__143_v0() {
     if [ ${dump} != 0 ]; then
         tar_cmd="tar -x -O ${member} -f ${archive}"
 fi
-    __AMBER_VAL_30=$(${tar_cmd});
+    __AMBER_VAL_31=$(${tar_cmd});
     __AS=$?;
 if [ $__AS != 0 ]; then
         local tar_status=$__AS
@@ -443,7 +454,7 @@ if [ $__AS != 0 ]; then
         __AF_untar143_v0='';
         return ${tar_status}
 fi;
-    local tar_out="${__AMBER_VAL_30}"
+    local tar_out="${__AMBER_VAL_31}"
     rm ${archive};
     __AS=$?
     __AF_untar143_v0="${tar_out}";
@@ -451,14 +462,14 @@ fi;
 }
 check_deps__144_v0() {
     local deps=("${!1}")
-    __AMBER_ARRAY_31=();
-    local missing=("${__AMBER_ARRAY_31[@]}")
+    __AMBER_ARRAY_32=();
+    local missing=("${__AMBER_ARRAY_32[@]}")
     for dep in "${deps[@]}"; do
         is_command__93_v0 "${dep}";
         __AF_is_command93_v0__136_16="$__AF_is_command93_v0";
         if [ $(echo  '!' "$__AF_is_command93_v0__136_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            __AMBER_ARRAY_32=("${dep}");
-            missing+=("${__AMBER_ARRAY_32[@]}")
+            __AMBER_ARRAY_33=("${dep}");
+            missing+=("${__AMBER_ARRAY_33[@]}")
 fi
 done
     if [ $(echo "${#missing[@]}" '>' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
@@ -477,90 +488,142 @@ done
         return 1
 fi
 }
-get_osname__154_v0() {
-    __AMBER_VAL_33=$(uname -s);
+get_osname__155_v0() {
+    __AMBER_VAL_34=$(uname -s);
     __AS=$?;
-    __AF_get_osname154_v0="${__AMBER_VAL_33}";
+    __AF_get_osname155_v0="${__AMBER_VAL_34}";
     return 0
 }
-get_machine__155_v0() {
-    __AMBER_VAL_34=$(uname -m);
+get_machine__156_v0() {
+    __AMBER_VAL_35=$(uname -m);
     __AS=$?;
-    local machine="${__AMBER_VAL_34}"
+    local machine="${__AMBER_VAL_35}"
     if [ $([ "_${machine}" != "_arm64" ]; echo $?) != 0 ]; then
-        __AF_get_machine155_v0="aarch64";
+        __AF_get_machine156_v0="aarch64";
         return 0
 fi
-    __AF_get_machine155_v0="${machine}";
+    __AF_get_machine156_v0="${machine}";
     return 0
 }
-get_system__156_v0() {
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__33_18="${__AF_get_osname154_v0}";
-    local osname="${__AF_get_osname154_v0__33_18}"
-    get_machine__155_v0 ;
-    __AF_get_machine155_v0__34_19="${__AF_get_machine155_v0}";
-    local machine="${__AF_get_machine155_v0__34_19}"
-    __AF_get_system156_v0="${osname}.${machine}";
+get_system__157_v0() {
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__34_18="${__AF_get_osname155_v0}";
+    local osname="${__AF_get_osname155_v0__34_18}"
+    get_machine__156_v0 ;
+    __AF_get_machine156_v0__35_19="${__AF_get_machine156_v0}";
+    local machine="${__AF_get_machine156_v0__35_19}"
+    __AF_get_system157_v0="${osname}.${machine}";
     return 0
 }
-get_nix_root__158_v0() {
+get_nix_root__159_v0() {
     env_var_get__91_v0 "HOME";
     __AS=$?;
-    __AF_env_var_get91_v0__52_26="${__AF_env_var_get91_v0}";
-    local userhome="${__AF_env_var_get91_v0__52_26}"
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__53_18="${__AF_get_osname154_v0}";
-    local osname="${__AF_get_osname154_v0__53_18}"
+    __AF_env_var_get91_v0__53_26="${__AF_env_var_get91_v0}";
+    local userhome="${__AF_env_var_get91_v0__53_26}"
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__54_18="${__AF_get_osname155_v0}";
+    local osname="${__AF_get_osname155_v0__54_18}"
     if [ $([ "_${osname}" != "_Darwin" ]; echo $?) != 0 ]; then
-        __AF_get_nix_root158_v0="${userhome}/Library/Nix";
+        __AF_get_nix_root159_v0="${userhome}/Library/Nix";
         return 0
 else
-        __AF_get_nix_root158_v0="${userhome}/.local/share/nix/root";
+        __AF_get_nix_root159_v0="${userhome}/.local/share/nix/root";
         return 0
 fi
 }
-get_cache_root__159_v0() {
+get_cache_root__160_v0() {
     env_var_get__91_v0 "HOME";
     __AS=$?;
-    __AF_env_var_get91_v0__63_26="${__AF_env_var_get91_v0}";
-    local userhome="${__AF_env_var_get91_v0__63_26}"
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__64_18="${__AF_get_osname154_v0}";
-    local osname="${__AF_get_osname154_v0__64_18}"
+    __AF_env_var_get91_v0__64_26="${__AF_env_var_get91_v0}";
+    local userhome="${__AF_env_var_get91_v0__64_26}"
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__65_18="${__AF_get_osname155_v0}";
+    local osname="${__AF_get_osname155_v0__65_18}"
     if [ $([ "_${osname}" != "_Darwin" ]; echo $?) != 0 ]; then
-        __AF_get_cache_root159_v0="${userhome}/Library/Caches";
+        __AF_get_cache_root160_v0="${userhome}/Library/Caches";
         return 0
 else
-        __AF_get_cache_root159_v0="${userhome}/.cache";
+        __AF_get_cache_root160_v0="${userhome}/.cache";
         return 0
 fi
 }
-get_repo_root__160_v0() {
+get_repo_root__161_v0() {
     get_self__141_v0 ;
-    __AF_get_self141_v0__77_24="${__AF_get_self141_v0}";
-    split__3_v0 "${__AF_get_self141_v0__77_24}" "/";
-    __AF_split3_v0__77_18=("${__AF_split3_v0[@]}");
-    local self_a=("${__AF_split3_v0__77_18[@]}")
+    __AF_get_self141_v0__78_24="${__AF_get_self141_v0}";
+    split__3_v0 "${__AF_get_self141_v0__78_24}" "/";
+    __AF_split3_v0__78_18=("${__AF_split3_v0[@]}");
+    local self_a=("${__AF_split3_v0__78_18[@]}")
     array_pop__119_v0 self_a;
-    __AF_array_pop119_v0__78_5="${__AF_array_pop119_v0}";
-    echo "${__AF_array_pop119_v0__78_5}" > /dev/null 2>&1
+    __AF_array_pop119_v0__79_5="${__AF_array_pop119_v0}";
+    echo "${__AF_array_pop119_v0__79_5}" > /dev/null 2>&1
     join__6_v0 self_a[@] "/";
-    __AF_join6_v0__80_26="${__AF_join6_v0}";
-    local self_dir="/""${__AF_join6_v0__80_26}"
-    __AMBER_VAL_35=$(git -C ${self_dir} rev-parse --show-toplevel);
+    __AF_join6_v0__81_26="${__AF_join6_v0}";
+    local self_dir="/""${__AF_join6_v0__81_26}"
+    __AMBER_VAL_36=$(git -C ${self_dir} rev-parse --show-toplevel);
     __AS=$?;
 if [ $__AS != 0 ]; then
         echo_warning__108_v0 "Failed to find current Git repository, using script parent directory.";
-        __AF_echo_warning108_v0__83_9="$__AF_echo_warning108_v0";
-        echo "$__AF_echo_warning108_v0__83_9" > /dev/null 2>&1
-        __AF_get_repo_root160_v0="${self_dir}";
+        __AF_echo_warning108_v0__84_9="$__AF_echo_warning108_v0";
+        echo "$__AF_echo_warning108_v0__84_9" > /dev/null 2>&1
+        __AF_get_repo_root161_v0="${self_dir}";
         return 0
 fi;
-    __AF_get_repo_root160_v0="${__AMBER_VAL_35}";
+    __AF_get_repo_root161_v0="${__AMBER_VAL_36}";
+    return 0
+}
+read_sysctl__162_v0() {
+    local path=$1
+    file_read__34_v0 "/proc/sys/${path}" > /dev/null 2>&1;
+    __AS=$?;
+if [ $__AS != 0 ]; then
+__AF_read_sysctl162_v0=''
+return $__AS
+fi;
+    __AF_file_read34_v0__91_19="${__AF_file_read34_v0}";
+    __AF_read_sysctl162_v0="${__AF_file_read34_v0__91_19}";
     return 0
 }
-cmd_help__174_v0() {
+check_sandbox__163_v0() {
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__98_18="${__AF_get_osname155_v0}";
+    local osname="${__AF_get_osname155_v0__98_18}"
+    if [ $([ "_${osname}" != "_Linux" ]; echo $?) != 0 ]; then
+        read_sysctl__162_v0 "kernel/unprivileged_userns_clone";
+        __AS=$?;
+        __AF_read_sysctl162_v0__102_18="${__AF_read_sysctl162_v0}";
+        if [ $([ "_${__AF_read_sysctl162_v0__102_18}" != "_0" ]; echo $?) != 0 ]; then
+            echo_warning__108_v0 "Unprivileged sandboxes are not allowed on this system.";
+            __AF_echo_warning108_v0__103_13="$__AF_echo_warning108_v0";
+            echo "$__AF_echo_warning108_v0__103_13" > /dev/null 2>&1
+            echo_warning__108_v0 "Running the following command as root may fix the issue:";
+            __AF_echo_warning108_v0__104_13="$__AF_echo_warning108_v0";
+            echo "$__AF_echo_warning108_v0__104_13" > /dev/null 2>&1
+            echo "    sysctl kernel.unprivileged_userns_clone=1"
+            __AF_check_sandbox163_v0=0;
+            return 0
+fi
+        read_sysctl__162_v0 "kernel/apparmor_restrict_unprivileged_userns";
+        __AS=$?;
+        __AF_read_sysctl162_v0__109_18="${__AF_read_sysctl162_v0}";
+        if [ $([ "_${__AF_read_sysctl162_v0__109_18}" != "_1" ]; echo $?) != 0 ]; then
+            echo_warning__108_v0 "AppArmor is restricting unprivileged sandboxes on this system.";
+            __AF_echo_warning108_v0__110_13="$__AF_echo_warning108_v0";
+            echo "$__AF_echo_warning108_v0__110_13" > /dev/null 2>&1
+            echo_warning__108_v0 "Running the following command as root may fix the issue:";
+            __AF_echo_warning108_v0__111_13="$__AF_echo_warning108_v0";
+            echo "$__AF_echo_warning108_v0__111_13" > /dev/null 2>&1
+            echo "    sysctl kernel.apparmor_restrict_unprivileged_userns=0"
+            __AF_check_sandbox163_v0=0;
+            return 0
+fi
+else
+        __AF_check_sandbox163_v0=1;
+        return 0
+fi
+    __AF_check_sandbox163_v0=1;
+    return 0
+}
+cmd_help__177_v0() {
     env_var_get__91_v0 "NIXIE_VERSION";
     __AS=$?;
     __AF_env_var_get91_v0__15_31="${__AF_env_var_get91_v0}";
@@ -575,14 +638,14 @@ cmd_help__174_v0() {
     echo "  --nixie-ignore-system   Behave as if Nix was not installed."
     exit 0
 }
-cmd_print_config__175_v0() {
+cmd_print_config__178_v0() {
     untar__143_v0 "features" 1;
     __AS=$?;
     __AF_untar143_v0__32_16="${__AF_untar143_v0}";
     echo "${__AF_untar143_v0__32_16}"
     exit 0
 }
-cmd_extract__176_v0() {
+cmd_extract__179_v0() {
     dir_create__38_v0 "nixie";
     __AF_dir_create38_v0__38_5="$__AF_dir_create38_v0";
     echo "$__AF_dir_create38_v0__38_5" > /dev/null 2>&1
@@ -593,16 +656,16 @@ cmd_extract__176_v0() {
     echo "${__AF_untar143_v0__40_11}" > /dev/null 2>&1
     exit 0
 }
-cmd_cleanup__177_v0() {
-    get_nix_root__158_v0 ;
-    __AF_get_nix_root158_v0__46_20="${__AF_get_nix_root158_v0}";
-    local nix_root="${__AF_get_nix_root158_v0__46_20}"
-    get_cache_root__159_v0 ;
-    __AF_get_cache_root159_v0__47_22="${__AF_get_cache_root159_v0}";
-    local cache_root="${__AF_get_cache_root159_v0__47_22}"
-    get_repo_root__160_v0 ;
-    __AF_get_repo_root160_v0__48_21="${__AF_get_repo_root160_v0}";
-    local repo_root="${__AF_get_repo_root160_v0__48_21}"
+cmd_cleanup__180_v0() {
+    get_nix_root__159_v0 ;
+    __AF_get_nix_root159_v0__46_20="${__AF_get_nix_root159_v0}";
+    local nix_root="${__AF_get_nix_root159_v0__46_20}"
+    get_cache_root__160_v0 ;
+    __AF_get_cache_root160_v0__47_22="${__AF_get_cache_root160_v0}";
+    local cache_root="${__AF_get_cache_root160_v0__47_22}"
+    get_repo_root__161_v0 ;
+    __AF_get_repo_root161_v0__48_21="${__AF_get_repo_root161_v0}";
+    local repo_root="${__AF_get_repo_root161_v0__48_21}"
     echo "Removing local Nix channels and build files..."
     chmod -R +wx ${repo_root}/.nixie 2>/dev/null;
     __AS=$?
@@ -618,7 +681,7 @@ cmd_cleanup__177_v0() {
     __AS=$?
     exit 0
 }
-opt_ignore_system__178_v0() {
+opt_ignore_system__181_v0() {
     echo_warning__108_v0 "Ignoring system-wide Nix for testing purposes.";
     __AF_echo_warning108_v0__66_5="$__AF_echo_warning108_v0";
     echo "$__AF_echo_warning108_v0__66_5" > /dev/null 2>&1
@@ -633,7 +696,7 @@ opt_ignore_system__178_v0() {
     __AF_env_var_set90_v0__69_11="$__AF_env_var_set90_v0";
     echo "$__AF_env_var_set90_v0__69_11" > /dev/null 2>&1
 }
-opt_no_precompiled__179_v0() {
+opt_no_precompiled__182_v0() {
     echo_warning__108_v0 "Ignoring precompiled binaries for testing purposes.";
     __AF_echo_warning108_v0__74_5="$__AF_echo_warning108_v0";
     echo "$__AF_echo_warning108_v0__74_5" > /dev/null 2>&1
@@ -649,7 +712,7 @@ opt_no_precompiled__179_v0() {
     __AF_env_var_set90_v0__77_11="$__AF_env_var_set90_v0";
     echo "$__AF_env_var_set90_v0__77_11" > /dev/null 2>&1
 }
-notfound__180_v0() {
+notfound__183_v0() {
     local cmd=$1
     env_var_get__91_v0 "0";
     __AS=$?;
@@ -659,44 +722,44 @@ notfound__180_v0() {
     __AF_echo_error109_v0__84_5="$__AF_echo_error109_v0";
     echo "$__AF_echo_error109_v0__84_5" > /dev/null 2>&1
 }
-eval_cmd__181_v0() {
+eval_cmd__184_v0() {
     local cmd=$1
     if [ $([ "_${cmd}" != "_help" ]; echo $?) != 0 ]; then
-        cmd_help__174_v0 ;
-        __AF_cmd_help174_v0__90_34="$__AF_cmd_help174_v0";
-        echo "$__AF_cmd_help174_v0__90_34" > /dev/null 2>&1
+        cmd_help__177_v0 ;
+        __AF_cmd_help177_v0__90_34="$__AF_cmd_help177_v0";
+        echo "$__AF_cmd_help177_v0__90_34" > /dev/null 2>&1
 elif [ $([ "_${cmd}" != "_print-config" ]; echo $?) != 0 ]; then
-        cmd_print_config__175_v0 ;
-        __AF_cmd_print_config175_v0__91_34="$__AF_cmd_print_config175_v0";
-        echo "$__AF_cmd_print_config175_v0__91_34" > /dev/null 2>&1
+        cmd_print_config__178_v0 ;
+        __AF_cmd_print_config178_v0__91_34="$__AF_cmd_print_config178_v0";
+        echo "$__AF_cmd_print_config178_v0__91_34" > /dev/null 2>&1
 elif [ $([ "_${cmd}" != "_extract" ]; echo $?) != 0 ]; then
-        cmd_extract__176_v0 ;
-        __AF_cmd_extract176_v0__92_34="$__AF_cmd_extract176_v0";
-        echo "$__AF_cmd_extract176_v0__92_34" > /dev/null 2>&1
+        cmd_extract__179_v0 ;
+        __AF_cmd_extract179_v0__92_34="$__AF_cmd_extract179_v0";
+        echo "$__AF_cmd_extract179_v0__92_34" > /dev/null 2>&1
 elif [ $([ "_${cmd}" != "_cleanup" ]; echo $?) != 0 ]; then
-        cmd_cleanup__177_v0 ;
-        __AF_cmd_cleanup177_v0__93_34="$__AF_cmd_cleanup177_v0";
-        echo "$__AF_cmd_cleanup177_v0__93_34" > /dev/null 2>&1
+        cmd_cleanup__180_v0 ;
+        __AF_cmd_cleanup180_v0__93_34="$__AF_cmd_cleanup180_v0";
+        echo "$__AF_cmd_cleanup180_v0__93_34" > /dev/null 2>&1
 elif [ $([ "_${cmd}" != "_ignore-system" ]; echo $?) != 0 ]; then
-        opt_ignore_system__178_v0 ;
-        __AF_opt_ignore_system178_v0__94_34="$__AF_opt_ignore_system178_v0";
-        echo "$__AF_opt_ignore_system178_v0__94_34" > /dev/null 2>&1
+        opt_ignore_system__181_v0 ;
+        __AF_opt_ignore_system181_v0__94_34="$__AF_opt_ignore_system181_v0";
+        echo "$__AF_opt_ignore_system181_v0__94_34" > /dev/null 2>&1
 elif [ $([ "_${cmd}" != "_no-precompiled" ]; echo $?) != 0 ]; then
-        opt_no_precompiled__179_v0 ;
-        __AF_opt_no_precompiled179_v0__95_34="$__AF_opt_no_precompiled179_v0";
-        echo "$__AF_opt_no_precompiled179_v0__95_34" > /dev/null 2>&1
+        opt_no_precompiled__182_v0 ;
+        __AF_opt_no_precompiled182_v0__95_34="$__AF_opt_no_precompiled182_v0";
+        echo "$__AF_opt_no_precompiled182_v0__95_34" > /dev/null 2>&1
 else
-        notfound__180_v0 "${cmd}";
-        __AF_notfound180_v0__96_15="$__AF_notfound180_v0";
-        echo "$__AF_notfound180_v0__96_15" > /dev/null 2>&1
+        notfound__183_v0 "${cmd}";
+        __AF_notfound183_v0__96_15="$__AF_notfound183_v0";
+        echo "$__AF_notfound183_v0__96_15" > /dev/null 2>&1
 fi
 }
-catch_args__182_v0() {
+catch_args__185_v0() {
     local __AMBER_ARRAY_args="$1[@]"
     local args=$1
     local local_args=("${!__AMBER_ARRAY_args}")
-    __AMBER_ARRAY_36=();
-    eval "${args}=(\"\${__AMBER_ARRAY_36[@]}\")"
+    __AMBER_ARRAY_37=();
+    eval "${args}=(\"\${__AMBER_ARRAY_37[@]}\")"
     for arg in "${local_args[@]}"; do
         local cmd=""
         starts_with__20_v0 "${arg}" "--nixie-";
@@ -706,16 +769,16 @@ catch_args__182_v0() {
             slice__22_v0 "${arg}" "${#__AMBER_LEN}" 0;
             __AF_slice22_v0__111_19="${__AF_slice22_v0}";
             cmd="${__AF_slice22_v0__111_19}"
-            eval_cmd__181_v0 "${cmd}";
-            __AF_eval_cmd181_v0__112_13="$__AF_eval_cmd181_v0";
-            echo "$__AF_eval_cmd181_v0__112_13" > /dev/null 2>&1
+            eval_cmd__184_v0 "${cmd}";
+            __AF_eval_cmd184_v0__112_13="$__AF_eval_cmd184_v0";
+            echo "$__AF_eval_cmd184_v0__112_13" > /dev/null 2>&1
 else
-            __AMBER_ARRAY_37=("${arg}");
-            eval "${args}+=(\"\${__AMBER_ARRAY_37[@]}\")"
+            __AMBER_ARRAY_38=("${arg}");
+            eval "${args}+=(\"\${__AMBER_ARRAY_38[@]}\")"
 fi
 done
 }
-file_download__233_v0() {
+file_download__237_v0() {
     local url=$1
     local path=$2
     is_command__93_v0 "curl";
@@ -734,23 +797,23 @@ elif [ "$__AF_is_command93_v0__15_9" != 0 ]; then
          aria2c "${url}" -d "${path}" ;
         __AS=$?
 else
-        __AF_file_download233_v0=0;
+        __AF_file_download237_v0=0;
         return 0
 fi
-    __AF_file_download233_v0=1;
+    __AF_file_download237_v0=1;
     return 0
 }
-cachix_url__239_v0() {
+cachix_url__243_v0() {
     local derivation=$1
     local member=$2
     env_var_get__91_v0 "SOURCE_CACHE";
     __AS=$?;
     __AF_env_var_get91_v0__13_30="${__AF_env_var_get91_v0}";
     local SOURCE_CACHE="${__AF_env_var_get91_v0__13_30}"
-    __AF_cachix_url239_v0="https://${SOURCE_CACHE}/serve/${derivation}/${member}";
+    __AF_cachix_url243_v0="https://${SOURCE_CACHE}/serve/${derivation}/${member}";
     return 0
 }
-pull_binary__241_v0() {
+pull_binary__245_v0() {
     local member=$1
     local dest=$2
     env_var_get__91_v0 "NIX_BINS_DERIVATION";
@@ -762,15 +825,15 @@ pull_binary__241_v0() {
     __AF_untar143_v0__86_23="${__AF_untar143_v0}";
     local where="${__AF_untar143_v0__86_23}"
     if [ $(echo $__AS '!=' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_VAL_38=$(mktemp -t nixie_${member}_XXXXXXXX);
+        __AMBER_VAL_39=$(mktemp -t nixie_${member}_XXXXXXXX);
         __AS=$?;
-        local tmpf="${__AMBER_VAL_38}"
-        cachix_url__239_v0 "${NIX_BINS_DERIVATION}" "${member}";
-        __AF_cachix_url239_v0__90_30="${__AF_cachix_url239_v0}";
-        file_download__233_v0 "${__AF_cachix_url239_v0__90_30}" "${tmpf}";
-        __AF_file_download233_v0__90_16="$__AF_file_download233_v0";
-        if [ $(echo  '!' "$__AF_file_download233_v0__90_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            __AF_pull_binary241_v0='';
+        local tmpf="${__AMBER_VAL_39}"
+        cachix_url__243_v0 "${NIX_BINS_DERIVATION}" "${member}";
+        __AF_cachix_url243_v0__90_30="${__AF_cachix_url243_v0}";
+        file_download__237_v0 "${__AF_cachix_url243_v0__90_30}" "${tmpf}";
+        __AF_file_download237_v0__90_16="$__AF_file_download237_v0";
+        if [ $(echo  '!' "$__AF_file_download237_v0__90_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+            __AF_pull_binary245_v0='';
             return 1
 fi
         where="${tmpf}"
@@ -778,23 +841,23 @@ fi
     mv "${where}" "${dest}"
 __AS=$?
 }
-__AMBER_VAL_39=$(tput tsl);
+__AMBER_VAL_40=$(tput tsl);
 __AS=$?;
-__15_tsl="${__AMBER_VAL_39}"
-__AMBER_VAL_40=$(tput fsl);
+__15_tsl="${__AMBER_VAL_40}"
+__AMBER_VAL_41=$(tput fsl);
 __AS=$?;
-__16_fsl="${__AMBER_VAL_40}"
-__AMBER_VAL_41=$(tput smcup);
+__16_fsl="${__AMBER_VAL_41}"
+__AMBER_VAL_42=$(tput smcup);
 __AS=$?;
-__17_smcup="${__AMBER_VAL_41}"
-__AMBER_VAL_42=$(tput rmcup);
+__17_smcup="${__AMBER_VAL_42}"
+__AMBER_VAL_43=$(tput rmcup);
 __AS=$?;
-__18_rmcup="${__AMBER_VAL_42}"
+__18_rmcup="${__AMBER_VAL_43}"
 env_var_get__91_v0 "TERM";
 __AS=$?;
 __AF_env_var_get91_v0__13_18="${__AF_env_var_get91_v0}";
 __19_TERM="${__AF_env_var_get91_v0__13_18}"
-can_set_title__258_v0() {
+can_set_title__262_v0() {
     local has_statusline=1
     tput hs;
     __AS=$?;
@@ -805,12 +868,12 @@ if [ $__AS != 0 ]; then
             TERM=xterm+sl tput hs;
             __AS=$?
             if [ $(echo $__AS '==' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-                __AMBER_VAL_43=$(TERM=xterm+sl tput tsl);
+                __AMBER_VAL_44=$(TERM=xterm+sl tput tsl);
                 __AS=$?;
-                __15_tsl="${__AMBER_VAL_43}"
-                __AMBER_VAL_44=$(TERM=xterm+sl tput fsl);
+                __15_tsl="${__AMBER_VAL_44}"
+                __AMBER_VAL_45=$(TERM=xterm+sl tput fsl);
                 __AS=$?;
-                __16_fsl="${__AMBER_VAL_44}"
+                __16_fsl="${__AMBER_VAL_45}"
 else
                 has_statusline=0
 fi
@@ -818,34 +881,34 @@ else
             has_statusline=0
 fi
 fi
-    __AF_can_set_title258_v0=${has_statusline};
+    __AF_can_set_title262_v0=${has_statusline};
     return 0
 }
-set_title__259_v0() {
+set_title__263_v0() {
     local title=$1
-    can_set_title__258_v0 ;
-    __AF_can_set_title258_v0__43_8="$__AF_can_set_title258_v0";
-    if [ "$__AF_can_set_title258_v0__43_8" != 0 ]; then
+    can_set_title__262_v0 ;
+    __AF_can_set_title262_v0__43_8="$__AF_can_set_title262_v0";
+    if [ "$__AF_can_set_title262_v0__43_8" != 0 ]; then
         echo "${__15_tsl}""${title}""${__16_fsl}"
 fi
 }
-__AMBER_VAL_45=$(tput tsl);
+__AMBER_VAL_46=$(tput tsl);
 __AS=$?;
-__20_tsl="${__AMBER_VAL_45}"
-__AMBER_VAL_46=$(tput fsl);
+__20_tsl="${__AMBER_VAL_46}"
+__AMBER_VAL_47=$(tput fsl);
 __AS=$?;
-__21_fsl="${__AMBER_VAL_46}"
-__AMBER_VAL_47=$(tput smcup);
+__21_fsl="${__AMBER_VAL_47}"
+__AMBER_VAL_48=$(tput smcup);
 __AS=$?;
-__22_smcup="${__AMBER_VAL_47}"
-__AMBER_VAL_48=$(tput rmcup);
+__22_smcup="${__AMBER_VAL_48}"
+__AMBER_VAL_49=$(tput rmcup);
 __AS=$?;
-__23_rmcup="${__AMBER_VAL_48}"
+__23_rmcup="${__AMBER_VAL_49}"
 env_var_get__91_v0 "TERM";
 __AS=$?;
 __AF_env_var_get91_v0__13_18="${__AF_env_var_get91_v0}";
 __24_TERM="${__AF_env_var_get91_v0__13_18}"
-can_set_title__278_v0() {
+can_set_title__283_v0() {
     local has_statusline=1
     tput hs;
     __AS=$?;
@@ -856,12 +919,12 @@ if [ $__AS != 0 ]; then
             TERM=xterm+sl tput hs;
             __AS=$?
             if [ $(echo $__AS '==' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-                __AMBER_VAL_49=$(TERM=xterm+sl tput tsl);
+                __AMBER_VAL_50=$(TERM=xterm+sl tput tsl);
                 __AS=$?;
-                __20_tsl="${__AMBER_VAL_49}"
-                __AMBER_VAL_50=$(TERM=xterm+sl tput fsl);
+                __20_tsl="${__AMBER_VAL_50}"
+                __AMBER_VAL_51=$(TERM=xterm+sl tput fsl);
                 __AS=$?;
-                __21_fsl="${__AMBER_VAL_50}"
+                __21_fsl="${__AMBER_VAL_51}"
 else
                 has_statusline=0
 fi
@@ -869,18 +932,18 @@ else
             has_statusline=0
 fi
 fi
-    __AF_can_set_title278_v0=${has_statusline};
+    __AF_can_set_title283_v0=${has_statusline};
     return 0
 }
-set_title__279_v0() {
+set_title__284_v0() {
     local title=$1
-    can_set_title__278_v0 ;
-    __AF_can_set_title278_v0__43_8="$__AF_can_set_title278_v0";
-    if [ "$__AF_can_set_title278_v0__43_8" != 0 ]; then
+    can_set_title__283_v0 ;
+    __AF_can_set_title283_v0__43_8="$__AF_can_set_title283_v0";
+    if [ "$__AF_can_set_title283_v0__43_8" != 0 ]; then
         echo "${__20_tsl}""${title}""${__21_fsl}"
 fi
 }
-exit_alt_buffer__281_v0() {
+exit_alt_buffer__286_v0() {
     echo "${__23_rmcup}"
 }
 __25_SELF=""
@@ -898,12 +961,12 @@ if [ "$__AF_text_contains14_v0__15_4" != 0 ]; then
         __AS=$?;
         __AF_env_var_get91_v0__17_25="${__AF_env_var_get91_v0}";
         PWD="${__AF_env_var_get91_v0__17_25}"
-        __AMBER_VAL_51=$(readlink ${__26_me});
+        __AMBER_VAL_52=$(readlink ${__26_me});
         __AS=$?;
 if [ $__AS != 0 ]; then
             __25_SELF="${PWD}/${__26_me}"
 fi;
-        rl="${__AMBER_VAL_51}"
+        rl="${__AMBER_VAL_52}"
         starts_with__20_v0 "${rl}" "/";
         __AF_starts_with20_v0__25_17="$__AF_starts_with20_v0";
         if [ $([ "_${rl}" != "_" ]; echo $?) != 0 ]; then
@@ -919,15 +982,15 @@ else
     __AF_echo_error109_v0__30_5="$__AF_echo_error109_v0";
     echo "$__AF_echo_error109_v0__30_5" > /dev/null 2>&1
 fi
-bail__286_v0() {
+bail__291_v0() {
     local message=$1
     local archive=$2
-    exit_alt_buffer__281_v0 ;
-    __AF_exit_alt_buffer281_v0__56_5="$__AF_exit_alt_buffer281_v0";
-    echo "$__AF_exit_alt_buffer281_v0__56_5" > /dev/null 2>&1
-    set_title__279_v0 "";
-    __AF_set_title279_v0__57_5="$__AF_set_title279_v0";
-    echo "$__AF_set_title279_v0__57_5" > /dev/null 2>&1
+    exit_alt_buffer__286_v0 ;
+    __AF_exit_alt_buffer286_v0__56_5="$__AF_exit_alt_buffer286_v0";
+    echo "$__AF_exit_alt_buffer286_v0__56_5" > /dev/null 2>&1
+    set_title__284_v0 "";
+    __AF_set_title284_v0__57_5="$__AF_set_title284_v0";
+    echo "$__AF_set_title284_v0__57_5" > /dev/null 2>&1
     echo_error__109_v0 "${message}" 0;
     __AF_echo_error109_v0__59_5="$__AF_echo_error109_v0";
     echo "$__AF_echo_error109_v0__59_5" > /dev/null 2>&1
@@ -940,14 +1003,14 @@ fi
     kill -ABRT $$;
     __AS=$?
 }
-get_self__287_v0() {
-    __AF_get_self287_v0="${__25_SELF}";
+get_self__292_v0() {
+    __AF_get_self292_v0="${__25_SELF}";
     return 0
 }
-dump_archive__288_v0() {
-    __AMBER_VAL_52=$(mktemp -t nixie_XXXXXXXX.tar);
+dump_archive__293_v0() {
+    __AMBER_VAL_53=$(mktemp -t nixie_XXXXXXXX.tar);
     __AS=$?;
-    local dest="${__AMBER_VAL_52}"
+    local dest="${__AMBER_VAL_53}"
     cat ${__25_SELF} | (
         read -r M
         while ! [[ "$M" =~ ^-----BEGIN\ ARCHIVE\ SECTION----- ]]
@@ -958,116 +1021,116 @@ dump_archive__288_v0() {
     __AS=$?;
 if [ $__AS != 0 ]; then
         if [ $(echo $__AS '!=' 2 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            bail__286_v0 "Could not find the script's resource archive." 1;
-            __AF_bail286_v0__92_13="$__AF_bail286_v0";
-            echo "$__AF_bail286_v0__92_13" > /dev/null 2>&1
+            bail__291_v0 "Could not find the script's resource archive." 1;
+            __AF_bail291_v0__92_13="$__AF_bail291_v0";
+            echo "$__AF_bail291_v0__92_13" > /dev/null 2>&1
 fi
 fi
-    __AF_dump_archive288_v0="${dest}";
+    __AF_dump_archive293_v0="${dest}";
     return 0
 }
-untar__289_v0() {
+untar__294_v0() {
     local member=$1
     local dump=$2
-    dump_archive__288_v0 ;
-    __AF_dump_archive288_v0__109_19="${__AF_dump_archive288_v0}";
-    local archive="${__AF_dump_archive288_v0__109_19}"
+    dump_archive__293_v0 ;
+    __AF_dump_archive293_v0__109_19="${__AF_dump_archive293_v0}";
+    local archive="${__AF_dump_archive293_v0__109_19}"
     local tar_cmd="tar -x ${member} -f ${archive}"
     if [ ${dump} != 0 ]; then
         tar_cmd="tar -x -O ${member} -f ${archive}"
 fi
-    __AMBER_VAL_53=$(${tar_cmd});
+    __AMBER_VAL_54=$(${tar_cmd});
     __AS=$?;
 if [ $__AS != 0 ]; then
         local tar_status=$__AS
         rm ${archive};
         __AS=$?
-        __AF_untar289_v0='';
+        __AF_untar294_v0='';
         return ${tar_status}
 fi;
-    local tar_out="${__AMBER_VAL_53}"
+    local tar_out="${__AMBER_VAL_54}"
     rm ${archive};
     __AS=$?
-    __AF_untar289_v0="${tar_out}";
+    __AF_untar294_v0="${tar_out}";
     return 0
 }
-get_osname__292_v0() {
-    __AMBER_VAL_54=$(uname -s);
+get_osname__297_v0() {
+    __AMBER_VAL_55=$(uname -s);
     __AS=$?;
-    __AF_get_osname292_v0="${__AMBER_VAL_54}";
+    __AF_get_osname297_v0="${__AMBER_VAL_55}";
     return 0
 }
-get_dll_ext__295_v0() {
-    get_osname__292_v0 ;
-    __AF_get_osname292_v0__42_18="${__AF_get_osname292_v0}";
-    local osname="${__AF_get_osname292_v0__42_18}"
+get_dll_ext__300_v0() {
+    get_osname__297_v0 ;
+    __AF_get_osname297_v0__43_18="${__AF_get_osname297_v0}";
+    local osname="${__AF_get_osname297_v0__43_18}"
     if [ $([ "_${osname}" != "_Darwin" ]; echo $?) != 0 ]; then
-        __AF_get_dll_ext295_v0="dylib";
+        __AF_get_dll_ext300_v0="dylib";
         return 0
 else
-        __AF_get_dll_ext295_v0="so";
+        __AF_get_dll_ext300_v0="so";
         return 0
 fi
 }
-get_cache_root__297_v0() {
+get_cache_root__302_v0() {
     env_var_get__91_v0 "HOME";
     __AS=$?;
-    __AF_env_var_get91_v0__63_26="${__AF_env_var_get91_v0}";
-    local userhome="${__AF_env_var_get91_v0__63_26}"
-    get_osname__292_v0 ;
-    __AF_get_osname292_v0__64_18="${__AF_get_osname292_v0}";
-    local osname="${__AF_get_osname292_v0__64_18}"
+    __AF_env_var_get91_v0__64_26="${__AF_env_var_get91_v0}";
+    local userhome="${__AF_env_var_get91_v0__64_26}"
+    get_osname__297_v0 ;
+    __AF_get_osname297_v0__65_18="${__AF_get_osname297_v0}";
+    local osname="${__AF_get_osname297_v0__65_18}"
     if [ $([ "_${osname}" != "_Darwin" ]; echo $?) != 0 ]; then
-        __AF_get_cache_root297_v0="${userhome}/Library/Caches";
+        __AF_get_cache_root302_v0="${userhome}/Library/Caches";
         return 0
 else
-        __AF_get_cache_root297_v0="${userhome}/.cache";
+        __AF_get_cache_root302_v0="${userhome}/.cache";
         return 0
 fi
 }
-get_repo_root__298_v0() {
-    get_self__287_v0 ;
-    __AF_get_self287_v0__77_24="${__AF_get_self287_v0}";
-    split__3_v0 "${__AF_get_self287_v0__77_24}" "/";
-    __AF_split3_v0__77_18=("${__AF_split3_v0[@]}");
-    local self_a=("${__AF_split3_v0__77_18[@]}")
+get_repo_root__303_v0() {
+    get_self__292_v0 ;
+    __AF_get_self292_v0__78_24="${__AF_get_self292_v0}";
+    split__3_v0 "${__AF_get_self292_v0__78_24}" "/";
+    __AF_split3_v0__78_18=("${__AF_split3_v0[@]}");
+    local self_a=("${__AF_split3_v0__78_18[@]}")
     array_pop__119_v0 self_a;
-    __AF_array_pop119_v0__78_5="${__AF_array_pop119_v0}";
-    echo "${__AF_array_pop119_v0__78_5}" > /dev/null 2>&1
+    __AF_array_pop119_v0__79_5="${__AF_array_pop119_v0}";
+    echo "${__AF_array_pop119_v0__79_5}" > /dev/null 2>&1
     join__6_v0 self_a[@] "/";
-    __AF_join6_v0__80_26="${__AF_join6_v0}";
-    local self_dir="/""${__AF_join6_v0__80_26}"
-    __AMBER_VAL_55=$(git -C ${self_dir} rev-parse --show-toplevel);
+    __AF_join6_v0__81_26="${__AF_join6_v0}";
+    local self_dir="/""${__AF_join6_v0__81_26}"
+    __AMBER_VAL_56=$(git -C ${self_dir} rev-parse --show-toplevel);
     __AS=$?;
 if [ $__AS != 0 ]; then
         echo_warning__108_v0 "Failed to find current Git repository, using script parent directory.";
-        __AF_echo_warning108_v0__83_9="$__AF_echo_warning108_v0";
-        echo "$__AF_echo_warning108_v0__83_9" > /dev/null 2>&1
-        __AF_get_repo_root298_v0="${self_dir}";
+        __AF_echo_warning108_v0__84_9="$__AF_echo_warning108_v0";
+        echo "$__AF_echo_warning108_v0__84_9" > /dev/null 2>&1
+        __AF_get_repo_root303_v0="${self_dir}";
         return 0
 fi;
-    __AF_get_repo_root298_v0="${__AMBER_VAL_55}";
+    __AF_get_repo_root303_v0="${__AMBER_VAL_56}";
     return 0
 }
 __27_step_current=1
-get_source_root__302_v0() {
-    get_repo_root__298_v0 ;
-    __AF_get_repo_root298_v0__38_21="${__AF_get_repo_root298_v0}";
-    local repo_root="${__AF_get_repo_root298_v0__38_21}"
-    __AF_get_source_root302_v0="${repo_root}/.nixie/sources";
+get_source_root__309_v0() {
+    get_repo_root__303_v0 ;
+    __AF_get_repo_root303_v0__38_21="${__AF_get_repo_root303_v0}";
+    local repo_root="${__AF_get_repo_root303_v0__38_21}"
+    __AF_get_source_root309_v0="${repo_root}/.nixie/sources";
     return 0
 }
-cachix_url__312_v0() {
+cachix_url__319_v0() {
     local derivation=$1
     local member=$2
     env_var_get__91_v0 "SOURCE_CACHE";
     __AS=$?;
     __AF_env_var_get91_v0__13_30="${__AF_env_var_get91_v0}";
     local SOURCE_CACHE="${__AF_env_var_get91_v0__13_30}"
-    __AF_cachix_url312_v0="https://${SOURCE_CACHE}/serve/${derivation}/${member}";
+    __AF_cachix_url319_v0="https://${SOURCE_CACHE}/serve/${derivation}/${member}";
     return 0
 }
-pull_source_file__313_v0() {
+pull_source_file__320_v0() {
     local member=$1
     local dest=$2
     env_var_get__91_v0 "SOURCE_DERIVATION";
@@ -1079,10 +1142,10 @@ pull_source_file__313_v0() {
     env_var_test__87_v0 "_NIXIE_TESTING_SKIP_TARBALL";
     __AF_env_var_test87_v0__36_12="$__AF_env_var_test87_v0";
     if [ $(echo  '!' "$__AF_env_var_test87_v0__36_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        untar__289_v0 "sources/${member}" 0;
+        untar__294_v0 "sources/${member}" 0;
         __AS=$?;
-        __AF_untar289_v0__37_23="${__AF_untar289_v0}";
-        where="${__AF_untar289_v0__37_23}"
+        __AF_untar294_v0__37_23="${__AF_untar294_v0}";
+        where="${__AF_untar294_v0__37_23}"
         my_status=$__AS
 fi
     env_var_test__87_v0 "_NIXIE_TESTING_SOURCES_DIR";
@@ -1092,9 +1155,9 @@ fi
         __AS=$?;
         __AF_env_var_get91_v0__42_28="${__AF_env_var_get91_v0}";
         local srcdir="${__AF_env_var_get91_v0__42_28}"
-        __AMBER_VAL_56=$(mktemp -t -d nixie_${member}_XXXXXXXX);
+        __AMBER_VAL_57=$(mktemp -t -d nixie_${member}_XXXXXXXX);
         __AS=$?;
-        local tmpd="${__AMBER_VAL_56}"
+        local tmpd="${__AMBER_VAL_57}"
         file_exists__33_v0 "${srcdir}/${member}.tar.gz";
         __AF_file_exists33_v0__45_12="$__AF_file_exists33_v0";
         if [ "$__AF_file_exists33_v0__45_12" != 0 ]; then
@@ -1107,24 +1170,24 @@ else
 fi
 fi
     if [ $(echo ${my_status} '!=' 0 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_VAL_57=$(mktemp -t nixie_src_XXXXXXXX.tgz);
+        __AMBER_VAL_58=$(mktemp -t nixie_src_XXXXXXXX.tgz);
         __AS=$?;
-        local tmpf="${__AMBER_VAL_57}"
-        __AMBER_VAL_58=$(mktemp -t -d nixie_${member}_XXXXXXXX);
+        local tmpf="${__AMBER_VAL_58}"
+        __AMBER_VAL_59=$(mktemp -t -d nixie_${member}_XXXXXXXX);
         __AS=$?;
-        local tmpd="${__AMBER_VAL_58}"
-        cachix_url__312_v0 "${SOURCE_DERIVATION}" "${member}.tar.gz";
-        __AF_cachix_url312_v0__58_30="${__AF_cachix_url312_v0}";
-        file_download__233_v0 "${__AF_cachix_url312_v0__58_30}" "${tmpf}";
-        __AF_file_download233_v0__58_16="$__AF_file_download233_v0";
-        if [ $(echo  '!' "$__AF_file_download233_v0__58_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            __AF_pull_source_file313_v0='';
+        local tmpd="${__AMBER_VAL_59}"
+        cachix_url__319_v0 "${SOURCE_DERIVATION}" "${member}.tar.gz";
+        __AF_cachix_url319_v0__58_30="${__AF_cachix_url319_v0}";
+        file_download__237_v0 "${__AF_cachix_url319_v0__58_30}" "${tmpf}";
+        __AF_file_download237_v0__58_16="$__AF_file_download237_v0";
+        if [ $(echo  '!' "$__AF_file_download237_v0__58_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+            __AF_pull_source_file320_v0='';
             return 1
 fi
         gzip -d -c ${tmpf} | tar -x -C ${tmpd};
         __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_pull_source_file313_v0=''
+__AF_pull_source_file320_v0=''
 return $__AS
 fi
         rm -f ${tmpf};
@@ -1137,18 +1200,18 @@ fi
 __AS=$?
 }
 __28_step_current=1
-pkg_exists__322_v0() {
+pkg_exists__329_v0() {
     local package=$1
     pkg-config ${package};
     __AS=$?;
 if [ $__AS != 0 ]; then
-        __AF_pkg_exists322_v0=0;
+        __AF_pkg_exists329_v0=0;
         return 0
 fi
-    __AF_pkg_exists322_v0=1;
+    __AF_pkg_exists329_v0=1;
     return 0
 }
-step_title__323_v0() {
+step_title__330_v0() {
     local name=$1
     env_var_get__91_v0 "step_total";
     __AS=$?;
@@ -1156,59 +1219,59 @@ step_title__323_v0() {
     local step_total="${__AF_env_var_get91_v0__26_28}"
     clear;
     __AS=$?
-    set_title__259_v0 "Building Nix: ${name} (${__28_step_current}/${step_total})";
-    __AF_set_title259_v0__30_5="$__AF_set_title259_v0";
-    echo "$__AF_set_title259_v0__30_5" > /dev/null 2>&1
+    set_title__263_v0 "Building Nix: ${name} (${__28_step_current}/${step_total})";
+    __AF_set_title263_v0__30_5="$__AF_set_title263_v0";
+    echo "$__AF_set_title263_v0__30_5" > /dev/null 2>&1
     __28_step_current=$(echo ${__28_step_current} '+' 1 | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//')
 }
-get_source_root__324_v0() {
-    get_repo_root__298_v0 ;
-    __AF_get_repo_root298_v0__38_21="${__AF_get_repo_root298_v0}";
-    local repo_root="${__AF_get_repo_root298_v0__38_21}"
-    __AF_get_source_root324_v0="${repo_root}/.nixie/sources";
+get_source_root__331_v0() {
+    get_repo_root__303_v0 ;
+    __AF_get_repo_root303_v0__38_21="${__AF_get_repo_root303_v0}";
+    local repo_root="${__AF_get_repo_root303_v0__38_21}"
+    __AF_get_source_root331_v0="${repo_root}/.nixie/sources";
     return 0
 }
-make_headers__328_v0() {
-    __AMBER_VAL_59=$(grep ".*\.h:" ./Makefile | cut -f 1 -d :);
+make_headers__335_v0() {
+    __AMBER_VAL_60=$(grep ".*\.h:" ./Makefile | cut -f 1 -d :);
     __AS=$?;
-    split_lines__4_v0 "${__AMBER_VAL_59}";
+    split_lines__4_v0 "${__AMBER_VAL_60}";
     __AF_split_lines4_v0__19_19=("${__AF_split_lines4_v0[@]}");
     for header in "${__AF_split_lines4_v0__19_19[@]}"; do
         make ${header};
         __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_make_headers328_v0=''
+__AF_make_headers335_v0=''
 return $__AS
 fi
 done
 }
-build_openssl_inner__329_v0() {
-    get_dll_ext__295_v0 ;
-    __AF_get_dll_ext295_v0__27_19="${__AF_get_dll_ext295_v0}";
-    local dll_ext="${__AF_get_dll_ext295_v0__27_19}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__28_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__28_22}"
+build_openssl_inner__336_v0() {
+    get_dll_ext__300_v0 ;
+    __AF_get_dll_ext300_v0__27_19="${__AF_get_dll_ext300_v0}";
+    local dll_ext="${__AF_get_dll_ext300_v0__27_19}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__28_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__28_22}"
     chmod +x ./config;
     __AS=$?
     ./config;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_openssl_inner329_v0=''
+__AF_build_openssl_inner336_v0=''
 return $__AS
 fi
-    make_headers__328_v0 ;
+    make_headers__335_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_openssl_inner329_v0=''
+__AF_build_openssl_inner336_v0=''
 return $__AS
 fi;
-    __AF_make_headers328_v0__33_5="$__AF_make_headers328_v0";
-    echo "$__AF_make_headers328_v0__33_5" > /dev/null 2>&1
+    __AF_make_headers335_v0__33_5="$__AF_make_headers335_v0";
+    echo "$__AF_make_headers335_v0__33_5" > /dev/null 2>&1
     make libcrypto.${dll_ext} libcrypto.pc;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_openssl_inner329_v0=''
+__AF_build_openssl_inner336_v0=''
 return $__AS
 fi
     cp ./libcrypto.* ${cache_root}/nix-deps/lib/;
@@ -1218,20 +1281,20 @@ fi
     cp -r ./include ${cache_root}/nix-deps/;
     __AS=$?
 }
-build_openssl__330_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__51_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__51_23}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__52_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__52_22}"
-    step_title__323_v0 "libcrypto";
-    __AF_step_title323_v0__54_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__54_5" > /dev/null 2>&1
-    pkg_exists__322_v0 "libcrypto";
-    __AF_pkg_exists322_v0__56_8="$__AF_pkg_exists322_v0";
-    if [ "$__AF_pkg_exists322_v0__56_8" != 0 ]; then
-        __AF_build_openssl330_v0=0;
+build_openssl__337_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__51_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__51_23}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__52_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__52_22}"
+    step_title__330_v0 "libcrypto";
+    __AF_step_title330_v0__54_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__54_5" > /dev/null 2>&1
+    pkg_exists__329_v0 "libcrypto";
+    __AF_pkg_exists329_v0__56_8="$__AF_pkg_exists329_v0";
+    if [ "$__AF_pkg_exists329_v0__56_8" != 0 ]; then
+        __AF_build_openssl337_v0=0;
         return 0
 fi
     env_var_test__87_v0 "OPENSSL_LIBS";
@@ -1239,140 +1302,140 @@ fi
     env_var_test__87_v0 "OPENSSL_CFLAGS";
     __AF_env_var_test87_v0__58_41="$__AF_env_var_test87_v0";
     if [ $(echo "$__AF_env_var_test87_v0__58_8" '&&' "$__AF_env_var_test87_v0__58_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AF_build_openssl330_v0=0;
+        __AF_build_openssl337_v0=0;
         return 0
 fi
-    pull_source_file__313_v0 "openssl" "${source_root}/openssl";
+    pull_source_file__320_v0 "openssl" "${source_root}/openssl";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_openssl330_v0=''
+__AF_build_openssl337_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__61_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__61_5" > /dev/null 2>&1
-    (cd ${source_root}/openssl && build_openssl_inner__329_v0);
+    __AF_pull_source_file320_v0__61_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__61_5" > /dev/null 2>&1
+    (cd ${source_root}/openssl && build_openssl_inner__336_v0);
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_openssl330_v0=''
+__AF_build_openssl337_v0=''
 return $__AS
 fi
 }
-macos_build_post__339_v0() {
+macos_build_post__346_v0() {
     cc -shared -o liblowdown.1.dylib *.o;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_macos_build_post339_v0=''
+__AF_macos_build_post346_v0=''
 return $__AS
 fi
 }
-build_lowdown_inner__340_v0() {
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__21_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__21_22}"
+build_lowdown_inner__347_v0() {
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__21_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__21_22}"
     ./configure PREFIX=${cache_root}/nix-deps;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown_inner340_v0=''
+__AF_build_lowdown_inner347_v0=''
 return $__AS
 fi
     make;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown_inner340_v0=''
+__AF_build_lowdown_inner347_v0=''
 return $__AS
 fi
-    get_osname__292_v0 ;
-    __AF_get_osname292_v0__26_8="${__AF_get_osname292_v0}";
-    if [ $([ "_${__AF_get_osname292_v0__26_8}" != "_Darwin" ]; echo $?) != 0 ]; then
-        macos_build_post__339_v0 ;
+    get_osname__297_v0 ;
+    __AF_get_osname297_v0__26_8="${__AF_get_osname297_v0}";
+    if [ $([ "_${__AF_get_osname297_v0__26_8}" != "_Darwin" ]; echo $?) != 0 ]; then
+        macos_build_post__346_v0 ;
         __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown_inner340_v0=''
+__AF_build_lowdown_inner347_v0=''
 return $__AS
 fi;
-        __AF_macos_build_post339_v0__27_9="$__AF_macos_build_post339_v0";
-        echo "$__AF_macos_build_post339_v0__27_9" > /dev/null 2>&1
+        __AF_macos_build_post346_v0__27_9="$__AF_macos_build_post346_v0";
+        echo "$__AF_macos_build_post346_v0__27_9" > /dev/null 2>&1
 fi
     make install_shared;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown_inner340_v0=''
+__AF_build_lowdown_inner347_v0=''
 return $__AS
 fi
 }
-build_lowdown__341_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__36_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__36_23}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__37_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__37_22}"
-    step_title__323_v0 "lowdown";
-    __AF_step_title323_v0__39_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__39_5" > /dev/null 2>&1
-    pkg_exists__322_v0 "lowdown";
-    __AF_pkg_exists322_v0__41_8="$__AF_pkg_exists322_v0";
-    if [ "$__AF_pkg_exists322_v0__41_8" != 0 ]; then
-        __AF_build_lowdown341_v0=0;
+build_lowdown__348_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__36_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__36_23}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__37_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__37_22}"
+    step_title__330_v0 "lowdown";
+    __AF_step_title330_v0__39_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__39_5" > /dev/null 2>&1
+    pkg_exists__329_v0 "lowdown";
+    __AF_pkg_exists329_v0__41_8="$__AF_pkg_exists329_v0";
+    if [ "$__AF_pkg_exists329_v0__41_8" != 0 ]; then
+        __AF_build_lowdown348_v0=0;
         return 0
 fi
-    pull_source_file__313_v0 "lowdown" "${source_root}/lowdown";
+    pull_source_file__320_v0 "lowdown" "${source_root}/lowdown";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown341_v0=''
+__AF_build_lowdown348_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__44_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__44_5" > /dev/null 2>&1
-    (cd ${source_root}/lowdown && build_lowdown_inner__340_v0);
+    __AF_pull_source_file320_v0__44_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__44_5" > /dev/null 2>&1
+    (cd ${source_root}/lowdown && build_lowdown_inner__347_v0);
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_lowdown341_v0=''
+__AF_build_lowdown348_v0=''
 return $__AS
 fi
 }
-build_nlohmann_json__350_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__16_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__16_23}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__17_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__17_22}"
-    step_title__323_v0 "nlohmann_json";
-    __AF_step_title323_v0__19_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__19_5" > /dev/null 2>&1
-    pkg_exists__322_v0 "nlohmann_json";
-    __AF_pkg_exists322_v0__21_8="$__AF_pkg_exists322_v0";
-    if [ "$__AF_pkg_exists322_v0__21_8" != 0 ]; then
-        __AF_build_nlohmann_json350_v0=0;
+build_nlohmann_json__357_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__16_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__16_23}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__17_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__17_22}"
+    step_title__330_v0 "nlohmann_json";
+    __AF_step_title330_v0__19_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__19_5" > /dev/null 2>&1
+    pkg_exists__329_v0 "nlohmann_json";
+    __AF_pkg_exists329_v0__21_8="$__AF_pkg_exists329_v0";
+    if [ "$__AF_pkg_exists329_v0__21_8" != 0 ]; then
+        __AF_build_nlohmann_json357_v0=0;
         return 0
 fi
-    pull_source_file__313_v0 "nlohmann_json" "${source_root}/nlohmann_json";
+    pull_source_file__320_v0 "nlohmann_json" "${source_root}/nlohmann_json";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nlohmann_json350_v0=''
+__AF_build_nlohmann_json357_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__24_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__24_5" > /dev/null 2>&1
-    __AMBER_VAL_60=$(grep "^version:" ${source_root}/nlohmann_json/wsjcpp.yml | cut -d '"' -f 2 | cut -d 'v' -f 2);
+    __AF_pull_source_file320_v0__24_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__24_5" > /dev/null 2>&1
+    __AMBER_VAL_61=$(grep "^version:" ${source_root}/nlohmann_json/wsjcpp.yml | cut -d '"' -f 2 | cut -d 'v' -f 2);
     __AS=$?;
-    local version="${__AMBER_VAL_60}"
+    local version="${__AMBER_VAL_61}"
     file_write__35_v0 "${cache_root}/nix-deps/lib/pkgconfig/nlohmann_json.pc" "Name: nlohmann_json
 Version: ${version}
 Description: JSON for Modern C++
 Cflags: -I${source_root}/nlohmann_json/include";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nlohmann_json350_v0=''
+__AF_build_nlohmann_json357_v0=''
 return $__AS
 fi;
     __AF_file_write35_v0__28_5="${__AF_file_write35_v0}";
     echo "${__AF_file_write35_v0__28_5}" > /dev/null 2>&1
 }
-__AMBER_ARRAY_61=("predef" "chrono" "container" "context" "coroutine" "system" "thread");
-__29_modules=("${__AMBER_ARRAY_61[@]}")
-find_boost_libs__359_v0() {
+__AMBER_ARRAY_62=("predef" "chrono" "container" "context" "coroutine" "system" "thread");
+__29_modules=("${__AMBER_ARRAY_62[@]}")
+find_boost_libs__366_v0() {
     local libs=("${!1}")
     for lib in "${libs[@]}"; do
         local libname="libboost_${lib}*"
@@ -1381,7 +1444,7 @@ find_boost_libs__359_v0() {
         file_exists__33_v0 "/usr/local/lib/${libname}";
         __AF_file_exists33_v0__24_20="$__AF_file_exists33_v0";
         if [ $(echo  '!' $(echo "$__AF_file_exists33_v0__23_20" '||' "$__AF_file_exists33_v0__24_20" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            __AF_find_boost_libs359_v0=0;
+            __AF_find_boost_libs366_v0=0;
             return 0
 fi
         dir_exists__32_v0 "/usr/include/boost/${lib}";
@@ -1389,60 +1452,60 @@ fi
         dir_exists__32_v0 "/usr/local/include/boost/${lib}";
         __AF_dir_exists32_v0__27_20="$__AF_dir_exists32_v0";
         if [ $(echo  '!' $(echo "$__AF_dir_exists32_v0__26_20" '||' "$__AF_dir_exists32_v0__27_20" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-            __AF_find_boost_libs359_v0=0;
+            __AF_find_boost_libs366_v0=0;
             return 0
 fi
 done
-    __AF_find_boost_libs359_v0=1;
+    __AF_find_boost_libs366_v0=1;
     return 0
 }
-build_boost_inner__360_v0() {
-    __AMBER_ARRAY_62=("variant=release" "link=static" "--stagedir=.");
-    local args=("${__AMBER_ARRAY_62[@]}")
+build_boost_inner__367_v0() {
+    __AMBER_ARRAY_63=("variant=release" "link=static" "--stagedir=.");
+    local args=("${__AMBER_ARRAY_63[@]}")
     for mod in "${__29_modules[@]}"; do
-        __AMBER_ARRAY_63=("--with-${mod}");
-        args+=("${__AMBER_ARRAY_63[@]}")
+        __AMBER_ARRAY_64=("--with-${mod}");
+        args+=("${__AMBER_ARRAY_64[@]}")
 done
     ./bootstrap.sh;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_boost_inner360_v0=''
+__AF_build_boost_inner367_v0=''
 return $__AS
 fi
     ./b2 "${args[@]}";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_boost_inner360_v0=''
+__AF_build_boost_inner367_v0=''
 return $__AS
 fi
 }
-build_boost__361_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__52_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__52_23}"
-    step_title__323_v0 "boost";
-    __AF_step_title323_v0__54_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__54_5" > /dev/null 2>&1
-    __AMBER_ARRAY_64=("atomic");
-    __AMBER_ARRAY_ADD_65=("${__AMBER_ARRAY_64[@]}" "${__29_modules[@]}");
-    find_boost_libs__359_v0 __AMBER_ARRAY_ADD_65[@];
-    __AF_find_boost_libs359_v0__56_8="$__AF_find_boost_libs359_v0";
-    if [ "$__AF_find_boost_libs359_v0__56_8" != 0 ]; then
-        __AF_build_boost361_v0=0;
+build_boost__368_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__52_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__52_23}"
+    step_title__330_v0 "boost";
+    __AF_step_title330_v0__54_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__54_5" > /dev/null 2>&1
+    __AMBER_ARRAY_65=("atomic");
+    __AMBER_ARRAY_ADD_66=("${__AMBER_ARRAY_65[@]}" "${__29_modules[@]}");
+    find_boost_libs__366_v0 __AMBER_ARRAY_ADD_66[@];
+    __AF_find_boost_libs366_v0__56_8="$__AF_find_boost_libs366_v0";
+    if [ "$__AF_find_boost_libs366_v0__56_8" != 0 ]; then
+        __AF_build_boost368_v0=0;
         return 0
 fi
-    pull_source_file__313_v0 "boost" "${source_root}/boost";
+    pull_source_file__320_v0 "boost" "${source_root}/boost";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_boost361_v0=''
+__AF_build_boost368_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__59_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__59_5" > /dev/null 2>&1
-    (cd ${source_root}/boost && build_boost_inner__360_v0);
+    __AF_pull_source_file320_v0__59_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__59_5" > /dev/null 2>&1
+    (cd ${source_root}/boost && build_boost_inner__367_v0);
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_boost361_v0=''
+__AF_build_boost368_v0=''
 return $__AS
 fi
     env_var_set__90_v0 "BOOST_ROOT" "${source_root}/boost";
@@ -1452,87 +1515,87 @@ fi
     export BOOST_ROOT;
     __AS=$?
 }
-build_autoconf_dep__369_v0() {
+build_autoconf_dep__376_v0() {
     local lib_name=$1
     local inc_prefix=$2
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__19_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__19_23}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__20_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__20_22}"
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__19_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__19_23}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__20_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__20_22}"
     local my_source="${source_root}/${lib_name}"
-    step_title__323_v0 "${lib_name}";
-    __AF_step_title323_v0__24_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__24_5" > /dev/null 2>&1
-    pkg_exists__322_v0 "${lib_name}";
-    __AF_pkg_exists322_v0__26_8="$__AF_pkg_exists322_v0";
-    if [ "$__AF_pkg_exists322_v0__26_8" != 0 ]; then
-        __AF_build_autoconf_dep369_v0='';
+    step_title__330_v0 "${lib_name}";
+    __AF_step_title330_v0__24_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__24_5" > /dev/null 2>&1
+    pkg_exists__329_v0 "${lib_name}";
+    __AF_pkg_exists329_v0__26_8="$__AF_pkg_exists329_v0";
+    if [ "$__AF_pkg_exists329_v0__26_8" != 0 ]; then
+        __AF_build_autoconf_dep376_v0='';
         return 0
 fi
-    pull_source_file__313_v0 "${lib_name}" "${my_source}";
+    pull_source_file__320_v0 "${lib_name}" "${my_source}";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_autoconf_dep369_v0=''
+__AF_build_autoconf_dep376_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__29_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__29_5" > /dev/null 2>&1
+    __AF_pull_source_file320_v0__29_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__29_5" > /dev/null 2>&1
     ( unset C_INCLUDE_PATH CPLUS_INCLUDE_PATH     && cd ${my_source}     && ./configure --prefix=${cache_root}/nix-deps     && make && make install );
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_autoconf_dep369_v0=''
+__AF_build_autoconf_dep376_v0=''
 return $__AS
 fi
 }
-build_nix_inner__379_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__16_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__16_23}"
+build_nix_inner__386_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__16_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__16_23}"
     local venv="${source_root}/nix/venv"
     mkdir build && cd build;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix_inner379_v0=''
+__AF_build_nix_inner386_v0=''
 return $__AS
 fi
     ${venv}/bin/meson setup -Dlibstore:seccomp-sandboxing=disabled                             -Dlibcmd:readline-flavor=editline                             -Dlibexpr:gc=disabled                             -Dlibutil:cpuid=disabled                             -Ddoc-gen=false                             -Dunit-tests=false                             -Dbindings=false                             ..;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix_inner379_v0=''
+__AF_build_nix_inner386_v0=''
 return $__AS
 fi
     ${venv}/bin/ninja;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix_inner379_v0=''
+__AF_build_nix_inner386_v0=''
 return $__AS
 fi
 }
-build_nix__380_v0() {
-    get_source_root__324_v0 ;
-    __AF_get_source_root324_v0__39_23="${__AF_get_source_root324_v0}";
-    local source_root="${__AF_get_source_root324_v0__39_23}"
-    get_cache_root__297_v0 ;
-    __AF_get_cache_root297_v0__40_22="${__AF_get_cache_root297_v0}";
-    local cache_root="${__AF_get_cache_root297_v0__40_22}"
+build_nix__387_v0() {
+    get_source_root__331_v0 ;
+    __AF_get_source_root331_v0__39_23="${__AF_get_source_root331_v0}";
+    local source_root="${__AF_get_source_root331_v0__39_23}"
+    get_cache_root__302_v0 ;
+    __AF_get_cache_root302_v0__40_22="${__AF_get_cache_root302_v0}";
+    local cache_root="${__AF_get_cache_root302_v0__40_22}"
     local venv="${source_root}/nix/venv"
-    step_title__323_v0 "nix";
-    __AF_step_title323_v0__44_5="$__AF_step_title323_v0";
-    echo "$__AF_step_title323_v0__44_5" > /dev/null 2>&1
-    pull_source_file__313_v0 "nix" "${source_root}/nix";
+    step_title__330_v0 "nix";
+    __AF_step_title330_v0__44_5="$__AF_step_title330_v0";
+    echo "$__AF_step_title330_v0__44_5" > /dev/null 2>&1
+    pull_source_file__320_v0 "nix" "${source_root}/nix";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix380_v0=''
+__AF_build_nix387_v0=''
 return $__AS
 fi;
-    __AF_pull_source_file313_v0__46_5="$__AF_pull_source_file313_v0";
-    echo "$__AF_pull_source_file313_v0__46_5" > /dev/null 2>&1
+    __AF_pull_source_file320_v0__46_5="$__AF_pull_source_file320_v0";
+    echo "$__AF_pull_source_file320_v0__46_5" > /dev/null 2>&1
     python3 -m venv --system-site-packages "${venv}";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix380_v0=''
+__AF_build_nix387_v0=''
 return $__AS
 fi
     export LIBRARY_PATH=${cache_root}/nix-deps/lib:$LIBRARY_PATH;
@@ -1542,22 +1605,22 @@ fi
     ${venv}/bin/pip install meson ninja;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix380_v0=''
+__AF_build_nix387_v0=''
 return $__AS
 fi
-    (cd ${source_root}/nix && build_nix_inner__379_v0);
+    (cd ${source_root}/nix && build_nix_inner__386_v0);
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_build_nix380_v0=''
+__AF_build_nix387_v0=''
 return $__AS
 fi
     mv "${source_root}/nix/src/nix/nix" "${cache_root}/nix-static"
 __AS=$?
 }
-darwin_export_sdk__382_v0() {
-    __AMBER_VAL_66=$(xcrun --show-sdk-path);
+darwin_export_sdk__389_v0() {
+    __AMBER_VAL_67=$(xcrun --show-sdk-path);
     __AS=$?;
-    local sdk_path="${__AMBER_VAL_66}"
+    local sdk_path="${__AMBER_VAL_67}"
     dir_exists__32_v0 "${sdk_path}";
     __AF_dir_exists32_v0__30_12="$__AF_dir_exists32_v0";
     if [ $(echo  '!' "$__AF_dir_exists32_v0__30_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
@@ -1594,12 +1657,12 @@ fi
     export LIBCURL_LIBS LIBCURL_CFLAGS                   LIBARCHIVE_LIBS LIBARCHIVE_CFLAGS                   OPENSSL_LIBS OPENSSL_CFLAGS;
     __AS=$?
 }
-try_build_nix__383_v0() {
-    get_cache_root__159_v0 ;
-    __AF_get_cache_root159_v0__55_22="${__AF_get_cache_root159_v0}";
-    local cache_root="${__AF_get_cache_root159_v0__55_22}"
-    __AMBER_ARRAY_67=("cc" "c++" "pkg-config" "make" "flex" "bison" "perl");
-    check_deps__144_v0 __AMBER_ARRAY_67[@];
+try_build_nix__390_v0() {
+    get_cache_root__160_v0 ;
+    __AF_get_cache_root160_v0__55_22="${__AF_get_cache_root160_v0}";
+    local cache_root="${__AF_get_cache_root160_v0__55_22}"
+    __AMBER_ARRAY_68=("cc" "c++" "pkg-config" "make" "flex" "bison" "perl");
+    check_deps__144_v0 __AMBER_ARRAY_68[@];
     __AS=$?;
 if [ $__AS != 0 ]; then
         bail__140_v0 "Missing required dependencies to build from source." 0;
@@ -1608,124 +1671,124 @@ if [ $__AS != 0 ]; then
 fi;
     __AF_check_deps144_v0__57_5="$__AF_check_deps144_v0";
     echo "$__AF_check_deps144_v0__57_5" > /dev/null 2>&1
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__60_8="${__AF_get_osname154_v0}";
-    if [ $([ "_${__AF_get_osname154_v0__60_8}" != "_Darwin" ]; echo $?) != 0 ]; then
-        darwin_export_sdk__382_v0 ;
-        __AF_darwin_export_sdk382_v0__61_9="$__AF_darwin_export_sdk382_v0";
-        echo "$__AF_darwin_export_sdk382_v0__61_9" > /dev/null 2>&1
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__60_8="${__AF_get_osname155_v0}";
+    if [ $([ "_${__AF_get_osname155_v0__60_8}" != "_Darwin" ]; echo $?) != 0 ]; then
+        darwin_export_sdk__389_v0 ;
+        __AF_darwin_export_sdk389_v0__61_9="$__AF_darwin_export_sdk389_v0";
+        echo "$__AF_darwin_export_sdk389_v0__61_9" > /dev/null 2>&1
 fi
     env_var_set__90_v0 "step_total" "9";
     __AS=$?;
     __AF_env_var_set90_v0__63_11="$__AF_env_var_set90_v0";
     echo "$__AF_env_var_set90_v0__63_11" > /dev/null 2>&1
-    get_source_root__302_v0 ;
-    __AF_get_source_root302_v0__65_16="${__AF_get_source_root302_v0}";
-    dir_create__38_v0 "${__AF_get_source_root302_v0__65_16}";
+    get_source_root__309_v0 ;
+    __AF_get_source_root309_v0__65_16="${__AF_get_source_root309_v0}";
+    dir_create__38_v0 "${__AF_get_source_root309_v0__65_16}";
     __AF_dir_create38_v0__65_5="$__AF_dir_create38_v0";
     echo "$__AF_dir_create38_v0__65_5" > /dev/null 2>&1
     dir_create__38_v0 "${cache_root}/nix-deps/lib/pkgconfig";
     __AF_dir_create38_v0__66_5="$__AF_dir_create38_v0";
     echo "$__AF_dir_create38_v0__66_5" > /dev/null 2>&1
-    build_openssl__330_v0 ;
+    build_openssl__337_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_openssl330_v0__68_5="$__AF_build_openssl330_v0";
-    echo "$__AF_build_openssl330_v0__68_5" > /dev/null 2>&1
-    build_boost__361_v0 ;
+    __AF_build_openssl337_v0__68_5="$__AF_build_openssl337_v0";
+    echo "$__AF_build_openssl337_v0__68_5" > /dev/null 2>&1
+    build_boost__368_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_boost361_v0__69_5="$__AF_build_boost361_v0";
-    echo "$__AF_build_boost361_v0__69_5" > /dev/null 2>&1
-    build_nlohmann_json__350_v0 ;
+    __AF_build_boost368_v0__69_5="$__AF_build_boost368_v0";
+    echo "$__AF_build_boost368_v0__69_5" > /dev/null 2>&1
+    build_nlohmann_json__357_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_nlohmann_json350_v0__70_5="$__AF_build_nlohmann_json350_v0";
-    echo "$__AF_build_nlohmann_json350_v0__70_5" > /dev/null 2>&1
-    build_lowdown__341_v0 ;
+    __AF_build_nlohmann_json357_v0__70_5="$__AF_build_nlohmann_json357_v0";
+    echo "$__AF_build_nlohmann_json357_v0__70_5" > /dev/null 2>&1
+    build_lowdown__348_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_lowdown341_v0__71_5="$__AF_build_lowdown341_v0";
-    echo "$__AF_build_lowdown341_v0__71_5" > /dev/null 2>&1
-    build_autoconf_dep__369_v0 "libbrotlicommon" "c/include";
+    __AF_build_lowdown348_v0__71_5="$__AF_build_lowdown348_v0";
+    echo "$__AF_build_lowdown348_v0__71_5" > /dev/null 2>&1
+    build_autoconf_dep__376_v0 "libbrotlicommon" "c/include";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_autoconf_dep369_v0__73_5="$__AF_build_autoconf_dep369_v0";
-    echo "$__AF_build_autoconf_dep369_v0__73_5" > /dev/null 2>&1
-    build_autoconf_dep__369_v0 "libsodium" "src/libsodium/include";
+    __AF_build_autoconf_dep376_v0__73_5="$__AF_build_autoconf_dep376_v0";
+    echo "$__AF_build_autoconf_dep376_v0__73_5" > /dev/null 2>&1
+    build_autoconf_dep__376_v0 "libsodium" "src/libsodium/include";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_autoconf_dep369_v0__74_5="$__AF_build_autoconf_dep369_v0";
-    echo "$__AF_build_autoconf_dep369_v0__74_5" > /dev/null 2>&1
-    build_autoconf_dep__369_v0 "libeditline" "include";
+    __AF_build_autoconf_dep376_v0__74_5="$__AF_build_autoconf_dep376_v0";
+    echo "$__AF_build_autoconf_dep376_v0__74_5" > /dev/null 2>&1
+    build_autoconf_dep__376_v0 "libeditline" "include";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_autoconf_dep369_v0__75_5="$__AF_build_autoconf_dep369_v0";
-    echo "$__AF_build_autoconf_dep369_v0__75_5" > /dev/null 2>&1
-    build_autoconf_dep__369_v0 "libarchive" "libarchive";
+    __AF_build_autoconf_dep376_v0__75_5="$__AF_build_autoconf_dep376_v0";
+    echo "$__AF_build_autoconf_dep376_v0__75_5" > /dev/null 2>&1
+    build_autoconf_dep__376_v0 "libarchive" "libarchive";
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_autoconf_dep369_v0__76_5="$__AF_build_autoconf_dep369_v0";
-    echo "$__AF_build_autoconf_dep369_v0__76_5" > /dev/null 2>&1
-    build_nix__380_v0 ;
+    __AF_build_autoconf_dep376_v0__76_5="$__AF_build_autoconf_dep376_v0";
+    echo "$__AF_build_autoconf_dep376_v0__76_5" > /dev/null 2>&1
+    build_nix__387_v0 ;
     __AS=$?;
 if [ $__AS != 0 ]; then
-__AF_try_build_nix383_v0=''
+__AF_try_build_nix390_v0=''
 return $__AS
 fi;
-    __AF_build_nix380_v0__77_5="$__AF_build_nix380_v0";
-    echo "$__AF_build_nix380_v0__77_5" > /dev/null 2>&1
+    __AF_build_nix387_v0__77_5="$__AF_build_nix387_v0";
+    echo "$__AF_build_nix387_v0__77_5" > /dev/null 2>&1
 }
-is_nix_installed__385_v0() {
+is_nix_installed__392_v0() {
     env_var_test__87_v0 "nosystem";
     __AF_env_var_test87_v0__24_8="$__AF_env_var_test87_v0";
     if [ "$__AF_env_var_test87_v0__24_8" != 0 ]; then
-        __AF_is_nix_installed385_v0=0;
+        __AF_is_nix_installed392_v0=0;
         return 0
 fi
     dir_exists__32_v0 "/nix/store";
     __AF_dir_exists32_v0__29_8="$__AF_dir_exists32_v0";
     if [ "$__AF_dir_exists32_v0__29_8" != 0 ]; then
-        __AF_is_nix_installed385_v0=1;
+        __AF_is_nix_installed392_v0=1;
         return 0
 fi
-    __AF_is_nix_installed385_v0=0;
+    __AF_is_nix_installed392_v0=0;
     return 0
 }
-get_nix__386_v0() {
-    get_cache_root__159_v0 ;
-    __AF_get_cache_root159_v0__44_22="${__AF_get_cache_root159_v0}";
-    local cache_root="${__AF_get_cache_root159_v0__44_22}"
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__45_18="${__AF_get_osname154_v0}";
-    local osname="${__AF_get_osname154_v0__45_18}"
-    get_system__156_v0 ;
-    __AF_get_system156_v0__46_18="${__AF_get_system156_v0}";
-    local system="${__AF_get_system156_v0__46_18}"
+get_nix__393_v0() {
+    get_cache_root__160_v0 ;
+    __AF_get_cache_root160_v0__44_22="${__AF_get_cache_root160_v0}";
+    local cache_root="${__AF_get_cache_root160_v0__44_22}"
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__45_18="${__AF_get_osname155_v0}";
+    local osname="${__AF_get_osname155_v0__45_18}"
+    get_system__157_v0 ;
+    __AF_get_system157_v0__46_18="${__AF_get_system157_v0}";
+    local system="${__AF_get_system157_v0__46_18}"
     local nix_path="${cache_root}/nix-static"
     local fakedir_path="${cache_root}/nix-deps/lib/libfakedir.dylib"
     enter_alt_buffer__134_v0 ;
@@ -1742,27 +1805,27 @@ get_nix__386_v0() {
         dir_create__38_v0 "${cache_root}/nix-deps/lib";
         __AF_dir_create38_v0__59_9="$__AF_dir_create38_v0";
         echo "$__AF_dir_create38_v0__59_9" > /dev/null 2>&1
-        pull_binary__241_v0 "libfakedir.dylib" "${fakedir_path}";
+        pull_binary__245_v0 "libfakedir.dylib" "${fakedir_path}";
         __AS=$?;
 if [ $__AS != 0 ]; then
             teardown__136_v0 1;
             __AF_teardown136_v0__61_13="$__AF_teardown136_v0";
             echo "$__AF_teardown136_v0__61_13" > /dev/null 2>&1
-            __AF_get_nix386_v0='';
+            __AF_get_nix393_v0='';
             return 1
 fi;
-        __AF_pull_binary241_v0__60_9="$__AF_pull_binary241_v0";
-        echo "$__AF_pull_binary241_v0__60_9" > /dev/null 2>&1
+        __AF_pull_binary245_v0__60_9="$__AF_pull_binary245_v0";
+        echo "$__AF_pull_binary245_v0__60_9" > /dev/null 2>&1
 fi
     get_self__141_v0 ;
     __AF_get_self141_v0__67_62="${__AF_get_self141_v0}";
     exists_newer__139_v0 "${fakedir_path}" "${__AF_get_self141_v0__67_62}";
     __AF_exists_newer139_v0__67_35="$__AF_exists_newer139_v0";
     if [ $(echo $([ "_${osname}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_exists_newer139_v0__67_35" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        pull_binary__241_v0 "libfakedir.dylib" "${fakedir_path}";
+        pull_binary__245_v0 "libfakedir.dylib" "${fakedir_path}";
         __AS=$?;
-        __AF_pull_binary241_v0__68_15="$__AF_pull_binary241_v0";
-        echo "$__AF_pull_binary241_v0__68_15" > /dev/null 2>&1
+        __AF_pull_binary245_v0__68_15="$__AF_pull_binary245_v0";
+        echo "$__AF_pull_binary245_v0__68_15" > /dev/null 2>&1
 fi
     file_exists__33_v0 "${nix_path}";
     __AF_file_exists33_v0__71_8="$__AF_file_exists33_v0";
@@ -1770,65 +1833,65 @@ fi
         teardown__136_v0 0;
         __AF_teardown136_v0__72_9="$__AF_teardown136_v0";
         echo "$__AF_teardown136_v0__72_9" > /dev/null 2>&1
-        __AF_get_nix386_v0=0;
+        __AF_get_nix393_v0=0;
         return 0
 fi
     env_var_test__87_v0 "nobins";
     __AF_env_var_test87_v0__76_8="$__AF_env_var_test87_v0";
     if [ "$__AF_env_var_test87_v0__76_8" != 0 ]; then
-        try_build_nix__383_v0 ;
+        try_build_nix__390_v0 ;
         __AS=$?;
 if [ $__AS != 0 ]; then
             teardown__136_v0 1;
             __AF_teardown136_v0__78_13="$__AF_teardown136_v0";
             echo "$__AF_teardown136_v0__78_13" > /dev/null 2>&1
-            __AF_get_nix386_v0='';
+            __AF_get_nix393_v0='';
             return 1
 fi;
-        __AF_try_build_nix383_v0__77_9="$__AF_try_build_nix383_v0";
-        echo "$__AF_try_build_nix383_v0__77_9" > /dev/null 2>&1
+        __AF_try_build_nix390_v0__77_9="$__AF_try_build_nix390_v0";
+        echo "$__AF_try_build_nix390_v0__77_9" > /dev/null 2>&1
 fi
-    pull_binary__241_v0 "nix.${system}" "${nix_path}";
+    pull_binary__245_v0 "nix.${system}" "${nix_path}";
     __AS=$?;
 if [ $__AS != 0 ]; then
-        try_build_nix__383_v0 ;
+        try_build_nix__390_v0 ;
         __AS=$?;
 if [ $__AS != 0 ]; then
             teardown__136_v0 1;
             __AF_teardown136_v0__86_13="$__AF_teardown136_v0";
             echo "$__AF_teardown136_v0__86_13" > /dev/null 2>&1
-            __AF_get_nix386_v0='';
+            __AF_get_nix393_v0='';
             return 1
 fi;
-        __AF_try_build_nix383_v0__85_9="$__AF_try_build_nix383_v0";
-        echo "$__AF_try_build_nix383_v0__85_9" > /dev/null 2>&1
+        __AF_try_build_nix390_v0__85_9="$__AF_try_build_nix390_v0";
+        echo "$__AF_try_build_nix390_v0__85_9" > /dev/null 2>&1
 fi;
-    __AF_pull_binary241_v0__84_5="$__AF_pull_binary241_v0";
-    echo "$__AF_pull_binary241_v0__84_5" > /dev/null 2>&1
+    __AF_pull_binary245_v0__84_5="$__AF_pull_binary245_v0";
+    echo "$__AF_pull_binary245_v0__84_5" > /dev/null 2>&1
     chmod +x ${nix_path};
     __AS=$?
     teardown__136_v0 0;
     __AF_teardown136_v0__93_5="$__AF_teardown136_v0";
     echo "$__AF_teardown136_v0__93_5" > /dev/null 2>&1
-    __AF_get_nix386_v0=0;
+    __AF_get_nix393_v0=0;
     return 0
 }
-migrate_nix_store__387_v0() {
+migrate_nix_store__394_v0() {
     local nix_root=""
-    get_nix_root__158_v0 ;
-    __AF_get_nix_root158_v0__105_30="${__AF_get_nix_root158_v0}";
-    __AMBER_VAL_68=$(readlink -f ${__AF_get_nix_root158_v0__105_30});
+    get_nix_root__159_v0 ;
+    __AF_get_nix_root159_v0__105_30="${__AF_get_nix_root159_v0}";
+    __AMBER_VAL_69=$(readlink -f ${__AF_get_nix_root159_v0__105_30});
     __AS=$?;
 if [ $__AS != 0 ]; then
-        get_nix_root__158_v0 ;
-        __AF_get_nix_root158_v0__106_20="${__AF_get_nix_root158_v0}";
-        nix_root="${__AF_get_nix_root158_v0__106_20}"
+        get_nix_root__159_v0 ;
+        __AF_get_nix_root159_v0__106_20="${__AF_get_nix_root159_v0}";
+        nix_root="${__AF_get_nix_root159_v0__106_20}"
 fi;
-    nix_root="${__AMBER_VAL_68}"
+    nix_root="${__AMBER_VAL_69}"
     dir_exists__32_v0 "${nix_root}/nix/store";
     __AF_dir_exists32_v0__109_12="$__AF_dir_exists32_v0";
     if [ $(echo  '!' "$__AF_dir_exists32_v0__109_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AF_migrate_nix_store387_v0=0;
+        __AF_migrate_nix_store394_v0=0;
         return 0
 fi
     echo "Migrating Nix store to system-wide install..."
@@ -1839,10 +1902,10 @@ fi
         __AS=$?
 fi
 }
-unpack_channels__388_v0() {
-    get_repo_root__160_v0 ;
-    __AF_get_repo_root160_v0__123_21="${__AF_get_repo_root160_v0}";
-    local repo_root="${__AF_get_repo_root160_v0__123_21}"
+unpack_channels__395_v0() {
+    get_repo_root__161_v0 ;
+    __AF_get_repo_root161_v0__123_21="${__AF_get_repo_root161_v0}";
+    local repo_root="${__AF_get_repo_root161_v0__123_21}"
     get_self__141_v0 ;
     __AF_get_self141_v0__125_52="${__AF_get_self141_v0}";
     exists_newer__139_v0 "${repo_root}/.nixie/channels" "${__AF_get_self141_v0__125_52}";
@@ -1858,7 +1921,7 @@ unpack_channels__388_v0() {
         echo "$__AF_env_var_set90_v0__127_15" > /dev/null 2>&1
         export NIX_PATH;
         __AS=$?
-        __AF_unpack_channels388_v0=0;
+        __AF_unpack_channels395_v0=0;
         return 0
 fi
     echo "Unpacking Nix channels, hang tight..."
@@ -1874,9 +1937,9 @@ fi;
     __AF_untar143_v0__134_5="${__AF_untar143_v0}";
     echo "${__AF_untar143_v0__134_5}" > /dev/null 2>&1
 }
-populate_extras__389_v0() {
-    __AMBER_ARRAY_69=();
-    local args=("${__AMBER_ARRAY_69[@]}")
+populate_extras__396_v0() {
+    __AMBER_ARRAY_70=();
+    local args=("${__AMBER_ARRAY_70[@]}")
     env_var_get__91_v0 "EXTRA_FEATURES";
     __AS=$?;
     __AF_env_var_get91_v0__146_43="${__AF_env_var_get91_v0}";
@@ -1889,44 +1952,44 @@ populate_extras__389_v0() {
     __AS=$?;
     __AF_env_var_get91_v0__148_43="${__AF_env_var_get91_v0}";
     local EXTRA_TRUSTED_PUBLIC_KEYS="${__AF_env_var_get91_v0__148_43}"
-    get_nix_root__158_v0 ;
-    __AF_get_nix_root158_v0__150_20="${__AF_get_nix_root158_v0}";
-    local nix_root="${__AF_get_nix_root158_v0__150_20}"
+    get_nix_root__159_v0 ;
+    __AF_get_nix_root159_v0__150_20="${__AF_get_nix_root159_v0}";
+    local nix_root="${__AF_get_nix_root159_v0__150_20}"
     if [ $([ "_${EXTRA_FEATURES}" == "_" ]; echo $?) != 0 ]; then
-        __AMBER_ARRAY_70=("--extra-experimental-features" "${EXTRA_FEATURES}");
-        args+=("${__AMBER_ARRAY_70[@]}")
+        __AMBER_ARRAY_71=("--extra-experimental-features" "${EXTRA_FEATURES}");
+        args+=("${__AMBER_ARRAY_71[@]}")
 fi
     if [ $([ "_${EXTRA_SUBSTITUTERS}" == "_" ]; echo $?) != 0 ]; then
-        __AMBER_ARRAY_71=("--extra-substituters" "${EXTRA_SUBSTITUTERS}");
-        args+=("${__AMBER_ARRAY_71[@]}")
+        __AMBER_ARRAY_72=("--extra-substituters" "${EXTRA_SUBSTITUTERS}");
+        args+=("${__AMBER_ARRAY_72[@]}")
 fi
     if [ $([ "_${EXTRA_TRUSTED_PUBLIC_KEYS}" == "_" ]; echo $?) != 0 ]; then
-        __AMBER_ARRAY_72=("--extra-trusted-public-keys" "${EXTRA_TRUSTED_PUBLIC_KEYS}");
-        args+=("${__AMBER_ARRAY_72[@]}")
+        __AMBER_ARRAY_73=("--extra-trusted-public-keys" "${EXTRA_TRUSTED_PUBLIC_KEYS}");
+        args+=("${__AMBER_ARRAY_73[@]}")
 fi
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__161_8="${__AF_get_osname154_v0}";
-    is_nix_installed__385_v0 ;
-    __AF_is_nix_installed385_v0__161_41="$__AF_is_nix_installed385_v0";
-    if [ $(echo $([ "_${__AF_get_osname154_v0__161_8}" == "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed385_v0__161_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_VAL_74=$(readlink -f ${nix_root});
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__161_8="${__AF_get_osname155_v0}";
+    is_nix_installed__392_v0 ;
+    __AF_is_nix_installed392_v0__161_41="$__AF_is_nix_installed392_v0";
+    if [ $(echo $([ "_${__AF_get_osname155_v0__161_8}" == "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed392_v0__161_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+        __AMBER_VAL_75=$(readlink -f ${nix_root});
         __AS=$?;
-        __AMBER_ARRAY_73=("--store" "${__AMBER_VAL_74}");
-        args+=("${__AMBER_ARRAY_73[@]}")
+        __AMBER_ARRAY_74=("--store" "${__AMBER_VAL_75}");
+        args+=("${__AMBER_ARRAY_74[@]}")
 fi
-    __AF_populate_extras389_v0=("${args[@]}");
+    __AF_populate_extras396_v0=("${args[@]}");
     return 0
 }
-launch_darwin_workaround__390_v0() {
+launch_darwin_workaround__397_v0() {
     local name=$1
     local nix_path=$2
     local args=("${!3}")
-    get_cache_root__159_v0 ;
-    __AF_get_cache_root159_v0__176_22="${__AF_get_cache_root159_v0}";
-    local cache_root="${__AF_get_cache_root159_v0__176_22}"
-    get_nix_root__158_v0 ;
-    __AF_get_nix_root158_v0__177_20="${__AF_get_nix_root158_v0}";
-    local nix_root="${__AF_get_nix_root158_v0__177_20}"
+    get_cache_root__160_v0 ;
+    __AF_get_cache_root160_v0__176_22="${__AF_get_cache_root160_v0}";
+    local cache_root="${__AF_get_cache_root160_v0__176_22}"
+    get_nix_root__159_v0 ;
+    __AF_get_nix_root159_v0__177_20="${__AF_get_nix_root159_v0}";
+    local nix_root="${__AF_get_nix_root159_v0__177_20}"
     local fakedir_path="${cache_root}/nix-deps/lib/libfakedir.dylib"
     env_var_set__90_v0 "FAKEDIR_PATTERN" "/nix";
     __AS=$?;
@@ -1941,60 +2004,60 @@ launch_darwin_workaround__390_v0() {
      _NIX_TEST_NO_SANDBOX=1             DYLD_INSERT_LIBRARIES="${fakedir_path}"             DYLD_LIBRARY_PATH="${cache_root}/nix-deps/lib"                 exec -a ${name} ${nix_path} "${args[@]}";
     __AS=$?
 }
-launch_shell_command__391_v0() {
+launch_shell_command__398_v0() {
     local nix_path=$1
     local cmd=$2
     local extras=("${!3}")
     local args=("${!4}")
-    get_repo_root__160_v0 ;
-    __AF_get_repo_root160_v0__205_21="${__AF_get_repo_root160_v0}";
-    local repo_root="${__AF_get_repo_root160_v0__205_21}"
+    get_repo_root__161_v0 ;
+    __AF_get_repo_root161_v0__205_21="${__AF_get_repo_root161_v0}";
+    local repo_root="${__AF_get_repo_root161_v0__205_21}"
     env_var_get__91_v0 "PWD";
     __AS=$?;
     __AF_env_var_get91_v0__206_21="${__AF_env_var_get91_v0}";
     local pwd="${__AF_env_var_get91_v0__206_21}"
     local name="nix-shell"
-    __AMBER_ARRAY_75=("${repo_root}/shell.nix" "--command" "${cmd} ${args[@]}");
-    local shell_cmd=("${__AMBER_ARRAY_75[@]}")
+    __AMBER_ARRAY_76=("${repo_root}/shell.nix" "--command" "${cmd} ${args[@]}");
+    local shell_cmd=("${__AMBER_ARRAY_76[@]}")
     file_exists__33_v0 "${pwd}/flake.nix";
     __AF_file_exists33_v0__210_8="$__AF_file_exists33_v0";
     if [ "$__AF_file_exists33_v0__210_8" != 0 ]; then
         name="nix"
-        __AMBER_ARRAY_76=("develop" "${pwd}" "-c" "${cmd}");
-        __AMBER_ARRAY_ADD_77=("${__AMBER_ARRAY_76[@]}" "${args[@]}");
-        shell_cmd=("${__AMBER_ARRAY_ADD_77[@]}")
+        __AMBER_ARRAY_77=("develop" "${pwd}" "-c" "${cmd}");
+        __AMBER_ARRAY_ADD_78=("${__AMBER_ARRAY_77[@]}" "${args[@]}");
+        shell_cmd=("${__AMBER_ARRAY_ADD_78[@]}")
 else
         file_exists__33_v0 "${repo_root}/flake.nix";
         __AF_file_exists33_v0__213_16="$__AF_file_exists33_v0";
         if [ "$__AF_file_exists33_v0__213_16" != 0 ]; then
             name="nix"
-            __AMBER_ARRAY_78=("develop" "${repo_root}" "-c" "${cmd}");
-            __AMBER_ARRAY_ADD_79=("${__AMBER_ARRAY_78[@]}" "${args[@]}");
-            shell_cmd=("${__AMBER_ARRAY_ADD_79[@]}")
+            __AMBER_ARRAY_79=("develop" "${repo_root}" "-c" "${cmd}");
+            __AMBER_ARRAY_ADD_80=("${__AMBER_ARRAY_79[@]}" "${args[@]}");
+            shell_cmd=("${__AMBER_ARRAY_ADD_80[@]}")
 else
             file_exists__33_v0 "${pwd}/shell.nix";
             __AF_file_exists33_v0__216_16="$__AF_file_exists33_v0";
             if [ "$__AF_file_exists33_v0__216_16" != 0 ]; then
-                __AMBER_ARRAY_80=("${pwd}/shell.nix" "--command" "${cmd} ${args[@]}");
-                shell_cmd=("${__AMBER_ARRAY_80[@]}")
+                __AMBER_ARRAY_81=("${pwd}/shell.nix" "--command" "${cmd} ${args[@]}");
+                shell_cmd=("${__AMBER_ARRAY_81[@]}")
 fi
 fi
 fi
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__220_8="${__AF_get_osname154_v0}";
-    is_nix_installed__385_v0 ;
-    __AF_is_nix_installed385_v0__220_41="$__AF_is_nix_installed385_v0";
-    if [ $(echo $([ "_${__AF_get_osname154_v0__220_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed385_v0__220_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_ARRAY_ADD_81=("${extras[@]}" "${shell_cmd[@]}");
-        launch_darwin_workaround__390_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_81[@];
-        __AF_launch_darwin_workaround390_v0__221_9="$__AF_launch_darwin_workaround390_v0";
-        echo "$__AF_launch_darwin_workaround390_v0__221_9" > /dev/null 2>&1
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__220_8="${__AF_get_osname155_v0}";
+    is_nix_installed__392_v0 ;
+    __AF_is_nix_installed392_v0__220_41="$__AF_is_nix_installed392_v0";
+    if [ $(echo $([ "_${__AF_get_osname155_v0__220_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed392_v0__220_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+        __AMBER_ARRAY_ADD_82=("${extras[@]}" "${shell_cmd[@]}");
+        launch_darwin_workaround__397_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_82[@];
+        __AF_launch_darwin_workaround397_v0__221_9="$__AF_launch_darwin_workaround397_v0";
+        echo "$__AF_launch_darwin_workaround397_v0__221_9" > /dev/null 2>&1
 else
         exec -a ${name} ${nix_path} "${extras[@]}" "${shell_cmd[@]}";
         __AS=$?
 fi
 }
-launch_nix_shebang__392_v0() {
+launch_nix_shebang__399_v0() {
     local nix_path=$1
     local file=$2
     local extras=("${!3}")
@@ -2011,7 +2074,7 @@ done <"${file}"
     starts_with__20_v0 "${shebang}" "#"'!'"";
     __AF_starts_with20_v0__247_12="$__AF_starts_with20_v0";
     if [ $(echo  '!' "$__AF_starts_with20_v0__247_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AF_launch_nix_shebang392_v0='';
+        __AF_launch_nix_shebang399_v0='';
         return 0
 fi
     slice__22_v0 "${shebang}" 2 0;
@@ -2031,33 +2094,33 @@ for arg in "${bang_args[@]}"; do
 fi
     (( i++ )) || true
 done
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__261_8="${__AF_get_osname154_v0}";
-    is_nix_installed__385_v0 ;
-    __AF_is_nix_installed385_v0__261_41="$__AF_is_nix_installed385_v0";
-    if [ $(echo $([ "_${__AF_get_osname154_v0__261_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed385_v0__261_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_ARRAY_ADD_82=("${extras[@]}" "${bang_args[@]}");
-        launch_darwin_workaround__390_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_82[@];
-        __AF_launch_darwin_workaround390_v0__262_9="$__AF_launch_darwin_workaround390_v0";
-        echo "$__AF_launch_darwin_workaround390_v0__262_9" > /dev/null 2>&1
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__261_8="${__AF_get_osname155_v0}";
+    is_nix_installed__392_v0 ;
+    __AF_is_nix_installed392_v0__261_41="$__AF_is_nix_installed392_v0";
+    if [ $(echo $([ "_${__AF_get_osname155_v0__261_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed392_v0__261_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+        __AMBER_ARRAY_ADD_83=("${extras[@]}" "${bang_args[@]}");
+        launch_darwin_workaround__397_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_83[@];
+        __AF_launch_darwin_workaround397_v0__262_9="$__AF_launch_darwin_workaround397_v0";
+        echo "$__AF_launch_darwin_workaround397_v0__262_9" > /dev/null 2>&1
 else
         exec -a ${name} ${nix_path} "${extras[@]}" "${bang_args[@]}";
         __AS=$?
 fi
 }
-launch_nix__393_v0() {
+launch_nix__400_v0() {
     local self=$1
     local args=("${!2}")
-    get_cache_root__159_v0 ;
-    __AF_get_cache_root159_v0__272_22="${__AF_get_cache_root159_v0}";
-    local cache_root="${__AF_get_cache_root159_v0__272_22}"
-    get_nix_root__158_v0 ;
-    __AF_get_nix_root158_v0__273_20="${__AF_get_nix_root158_v0}";
-    local nix_root="${__AF_get_nix_root158_v0__273_20}"
+    get_cache_root__160_v0 ;
+    __AF_get_cache_root160_v0__272_22="${__AF_get_cache_root160_v0}";
+    local cache_root="${__AF_get_cache_root160_v0__272_22}"
+    get_nix_root__159_v0 ;
+    __AF_get_nix_root159_v0__273_20="${__AF_get_nix_root159_v0}";
+    local nix_root="${__AF_get_nix_root159_v0__273_20}"
     local nix_path="${cache_root}/nix-static"
-    populate_extras__389_v0 ;
-    __AF_populate_extras389_v0__277_18=("${__AF_populate_extras389_v0[@]}");
-    local extras=("${__AF_populate_extras389_v0__277_18[@]}")
+    populate_extras__396_v0 ;
+    __AF_populate_extras396_v0__277_18=("${__AF_populate_extras396_v0[@]}");
+    local extras=("${__AF_populate_extras396_v0__277_18[@]}")
     split__3_v0 "${self}" "/";
     __AF_split3_v0__278_27=("${__AF_split3_v0[@]}");
     array_last__116_v0 __AF_split3_v0__278_27[@];
@@ -2066,59 +2129,66 @@ launch_nix__393_v0() {
     starts_with__20_v0 "${name}" "nix-";
     __AF_starts_with20_v0__280_8="$__AF_starts_with20_v0";
     if [ "$__AF_starts_with20_v0__280_8" != 0 ]; then
-        unpack_channels__388_v0 ;
-        __AF_unpack_channels388_v0__281_15="$__AF_unpack_channels388_v0";
-        echo "$__AF_unpack_channels388_v0__281_15" > /dev/null 2>&1
-fi
-    is_nix_installed__385_v0 ;
-    __AF_is_nix_installed385_v0__283_8="$__AF_is_nix_installed385_v0";
-    if [ "$__AF_is_nix_installed385_v0__283_8" != 0 ]; then
-        migrate_nix_store__387_v0 ;
-        __AF_migrate_nix_store387_v0__284_9="$__AF_migrate_nix_store387_v0";
-        echo "$__AF_migrate_nix_store387_v0__284_9" > /dev/null 2>&1
+        unpack_channels__395_v0 ;
+        __AF_unpack_channels395_v0__281_15="$__AF_unpack_channels395_v0";
+        echo "$__AF_unpack_channels395_v0__281_15" > /dev/null 2>&1
+fi
+    is_nix_installed__392_v0 ;
+    __AF_is_nix_installed392_v0__283_8="$__AF_is_nix_installed392_v0";
+    if [ "$__AF_is_nix_installed392_v0__283_8" != 0 ]; then
+        migrate_nix_store__394_v0 ;
+        __AF_migrate_nix_store394_v0__284_9="$__AF_migrate_nix_store394_v0";
+        echo "$__AF_migrate_nix_store394_v0__284_9" > /dev/null 2>&1
         nix_path="nix"
 else
-        get_nix__386_v0 ;
+        get_nix__393_v0 ;
         __AS=$?;
 if [ $__AS != 0 ]; then
             bail__140_v0 "Failed to obtain Nix. Check your internet connection." 0;
             __AF_bail140_v0__288_13="$__AF_bail140_v0";
             echo "$__AF_bail140_v0__288_13" > /dev/null 2>&1
 fi;
-        __AF_get_nix386_v0__287_9="$__AF_get_nix386_v0";
-        echo "$__AF_get_nix386_v0__287_9" > /dev/null 2>&1
+        __AF_get_nix393_v0__287_9="$__AF_get_nix393_v0";
+        echo "$__AF_get_nix393_v0__287_9" > /dev/null 2>&1
+        check_sandbox__163_v0 ;
+        __AF_check_sandbox163_v0__290_16="$__AF_check_sandbox163_v0";
+        if [ $(echo  '!' "$__AF_check_sandbox163_v0__290_16" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+            bail__140_v0 "Issues that prevent the Nix sandbox from working have been detected." 0;
+            __AF_bail140_v0__291_13="$__AF_bail140_v0";
+            echo "$__AF_bail140_v0__291_13" > /dev/null 2>&1
+fi
 fi
     export NIX_SSL_CERT_FILE;
     __AS=$?
     file_exists__33_v0 "${args[0]}";
-    __AF_file_exists33_v0__294_8="$__AF_file_exists33_v0";
+    __AF_file_exists33_v0__297_8="$__AF_file_exists33_v0";
     ends_with__21_v0 "${args[0]}" ".nix";
-    __AF_ends_with21_v0__294_37="$__AF_ends_with21_v0";
-    if [ $(echo "$__AF_file_exists33_v0__294_8" '&&' $(echo  '!' "$__AF_ends_with21_v0__294_37" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+    __AF_ends_with21_v0__297_37="$__AF_ends_with21_v0";
+    if [ $(echo "$__AF_file_exists33_v0__297_8" '&&' $(echo  '!' "$__AF_ends_with21_v0__297_37" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
         local args_shebang=("${args[@]}")
         array_shift__120_v0 args_shebang;
-        __AF_array_shift120_v0__296_9="${__AF_array_shift120_v0}";
-        echo "${__AF_array_shift120_v0__296_9}" > /dev/null 2>&1
-        launch_nix_shebang__392_v0 "${nix_path}" "${args[0]}" extras[@] args_shebang[@];
-        __AF_launch_nix_shebang392_v0__297_9="$__AF_launch_nix_shebang392_v0";
-        echo "$__AF_launch_nix_shebang392_v0__297_9" > /dev/null 2>&1
+        __AF_array_shift120_v0__299_9="${__AF_array_shift120_v0}";
+        echo "${__AF_array_shift120_v0__299_9}" > /dev/null 2>&1
+        launch_nix_shebang__399_v0 "${nix_path}" "${args[0]}" extras[@] args_shebang[@];
+        __AF_launch_nix_shebang399_v0__300_9="$__AF_launch_nix_shebang399_v0";
+        echo "$__AF_launch_nix_shebang399_v0__300_9" > /dev/null 2>&1
 fi
     starts_with__20_v0 "${name}" "nix";
-    __AF_starts_with20_v0__300_12="$__AF_starts_with20_v0";
-    if [ $(echo  '!' "$__AF_starts_with20_v0__300_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        launch_shell_command__391_v0 "${nix_path}" "${name}" extras[@] args[@];
-        __AF_launch_shell_command391_v0__301_9="$__AF_launch_shell_command391_v0";
-        echo "$__AF_launch_shell_command391_v0__301_9" > /dev/null 2>&1
-fi
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__304_8="${__AF_get_osname154_v0}";
-    is_nix_installed__385_v0 ;
-    __AF_is_nix_installed385_v0__304_41="$__AF_is_nix_installed385_v0";
-    if [ $(echo $([ "_${__AF_get_osname154_v0__304_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed385_v0__304_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
-        __AMBER_ARRAY_ADD_83=("${extras[@]}" "${args[@]}");
-        launch_darwin_workaround__390_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_83[@];
-        __AF_launch_darwin_workaround390_v0__305_9="$__AF_launch_darwin_workaround390_v0";
-        echo "$__AF_launch_darwin_workaround390_v0__305_9" > /dev/null 2>&1
+    __AF_starts_with20_v0__303_12="$__AF_starts_with20_v0";
+    if [ $(echo  '!' "$__AF_starts_with20_v0__303_12" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+        launch_shell_command__398_v0 "${nix_path}" "${name}" extras[@] args[@];
+        __AF_launch_shell_command398_v0__304_9="$__AF_launch_shell_command398_v0";
+        echo "$__AF_launch_shell_command398_v0__304_9" > /dev/null 2>&1
+fi
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__307_8="${__AF_get_osname155_v0}";
+    is_nix_installed__392_v0 ;
+    __AF_is_nix_installed392_v0__307_41="$__AF_is_nix_installed392_v0";
+    if [ $(echo $([ "_${__AF_get_osname155_v0__307_8}" != "_Darwin" ]; echo $?) '&&' $(echo  '!' "$__AF_is_nix_installed392_v0__307_41" | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') | bc -l | sed '/\./ s/\.\{0,1\}0\{1,\}$//') != 0 ]; then
+        __AMBER_ARRAY_ADD_84=("${extras[@]}" "${args[@]}");
+        launch_darwin_workaround__397_v0 "${name}" "${nix_path}" __AMBER_ARRAY_ADD_84[@];
+        __AF_launch_darwin_workaround397_v0__308_9="$__AF_launch_darwin_workaround397_v0";
+        echo "$__AF_launch_darwin_workaround397_v0__308_9" > /dev/null 2>&1
 else
         exec -a ${name} ${nix_path} "${extras[@]}" "${args[@]}";
         __AS=$?
@@ -2131,17 +2201,17 @@ __3_EXTRA_FEATURES=""
 __4_EXTRA_SUBSTITUTERS=""
 __5_EXTRA_TRUSTED_PUBLIC_KEYS=""
 __6_NIXIE_VERSION=""
-__AMBER_ARRAY_84=();
-__7_args=("${__AMBER_ARRAY_84[@]}")
-__AMBER_ARRAY_85=("tar" "gzip" "uname");
-check_deps__144_v0 __AMBER_ARRAY_85[@];
+__AMBER_ARRAY_85=();
+__7_args=("${__AMBER_ARRAY_85[@]}")
+__AMBER_ARRAY_86=("tar" "gzip" "uname");
+check_deps__144_v0 __AMBER_ARRAY_86[@];
 __AS=$?;
 if [ $__AS != 0 ]; then
     exit 1
 fi;
 __AF_check_deps144_v0__26_1="$__AF_check_deps144_v0";
 echo "$__AF_check_deps144_v0__26_1" > /dev/null 2>&1
-load_features__395_v0() {
+load_features__402_v0() {
     untar__143_v0 "features" 1;
     __AS=$?;
 if [ $__AS != 0 ]; then
@@ -2189,36 +2259,36 @@ fi
 }
 declare -r cmdl=("$0" "$@")
     __7_args=("${cmdl[@]}")
-    load_features__395_v0 ;
-    __AF_load_features395_v0__62_5="$__AF_load_features395_v0";
-    echo "$__AF_load_features395_v0__62_5" > /dev/null 2>&1
-    catch_args__182_v0 __7_args;
-    __AF_catch_args182_v0__63_5="$__AF_catch_args182_v0";
-    echo "$__AF_catch_args182_v0__63_5" > /dev/null 2>&1
+    load_features__402_v0 ;
+    __AF_load_features402_v0__62_5="$__AF_load_features402_v0";
+    echo "$__AF_load_features402_v0__62_5" > /dev/null 2>&1
+    catch_args__185_v0 __7_args;
+    __AF_catch_args185_v0__63_5="$__AF_catch_args185_v0";
+    echo "$__AF_catch_args185_v0__63_5" > /dev/null 2>&1
     array_shift__120_v0 __7_args;
     __AF_array_shift120_v0__65_16="${__AF_array_shift120_v0}";
     self="${__AF_array_shift120_v0__65_16}"
     file_exists__33_v0 "/etc/pki/tls/certs/ca-bundle.crt";
     __AF_file_exists33_v0__69_5="$__AF_file_exists33_v0";
-    get_osname__154_v0 ;
-    __AF_get_osname154_v0__71_5="${__AF_get_osname154_v0}";
+    get_osname__155_v0 ;
+    __AF_get_osname155_v0__71_5="${__AF_get_osname155_v0}";
     if [ "$__AF_file_exists33_v0__69_5" != 0 ]; then
         env_var_set__90_v0 "NIX_SSL_CERT_FILE" "/etc/pki/tls/certs/ca-bundle.crt";
         __AS=$?;
         __AF_env_var_set90_v0__70_15="$__AF_env_var_set90_v0";
         echo "$__AF_env_var_set90_v0__70_15" > /dev/null 2>&1
-elif [ $([ "_${__AF_get_osname154_v0__71_5}" != "_Darwin" ]; echo $?) != 0 ]; then
+elif [ $([ "_${__AF_get_osname155_v0__71_5}" != "_Darwin" ]; echo $?) != 0 ]; then
         env_var_set__90_v0 "NIX_SSL_CERT_FILE" "/etc/ssl/cert.pem";
         __AS=$?;
         __AF_env_var_set90_v0__72_15="$__AF_env_var_set90_v0";
         echo "$__AF_env_var_set90_v0__72_15" > /dev/null 2>&1
 fi
-    launch_nix__393_v0 "${self}" __7_args[@];
-    __AF_launch_nix393_v0__75_5="$__AF_launch_nix393_v0";
-    echo "$__AF_launch_nix393_v0__75_5" > /dev/null 2>&1
+    launch_nix__400_v0 "${self}" __7_args[@];
+    __AF_launch_nix400_v0__75_5="$__AF_launch_nix400_v0";
+    echo "$__AF_launch_nix400_v0__75_5" > /dev/null 2>&1
 exit 0
 cat <<DONOTPARSE
 
 -----BEGIN ARCHIVE SECTION-----[?1049h
-����g����n�@`�>�q�!,\N�Im`0vEFp�т���M�}�4=��N�{g�ZOźT~i�v���������p�t��N�Q͓��D�ܵ�'jqߥޤ�Ǘ~��2�G]��d]�:m��m�3�s�6�{�����4x��W�/��v��}ס�c9ϴ]Z�0E��/�}�yD��e���l�)�C�Tur٩��co�Z7�(�H�wfl�l�}�W��%�����!�yު�͝����!F�E��k\%�x@ԾP;
+��.�g����n�@`�>�q�!,\N�Im`0vEFp�т���M�}�4=��N�{g�ZOźT~i�v���������p�t��N�Q͓��D�ܵ�'jqߥޤ�Ǘ~��2�G]��d]�:m��m�3�s�6�{�����4x��W�/��v��}ס�c9ϴ]Z�0E��/�}�yD��e���l�)�C�Tur٩��co�Z7�(�H�wfl�l�}�W��%�����!�yު�͝����!F�E��k\%�x@ԾP;
 �_�	�ˡ�([?1049l 
# (tarball data)
\ No newline at end of file
diff --git a/src/nix.ab b/src/nix.ab
index aa566aa..52d84a0 100644
--- a/src/nix.ab
+++ b/src/nix.ab
@@ -9,8 +9,8 @@ import { array_last, array_shift }                from "std/array"
 
 import { enter_alt_buffer, set_title, teardown }  from "./term.ab"
 import { bail, untar, exists_newer, get_self }    from "./common.ab"
-import { get_osname, get_system, get_cache_root
-       , get_nix_root, get_repo_root }            from "./platform.ab"
+import { get_osname, get_system, get_cache_root, get_nix_root
+       , get_repo_root, check_sandbox }           from "./platform.ab"
 import { pull_binary }                            from "./resources.ab"
 import { try_build_nix }                          from "./builders.ab"
 
@@ -287,6 +287,9 @@ pub fun launch_nix(self: Text, args: [Text]): Null
         get_nix() failed {
             bail("Failed to obtain Nix. Check your internet connection.")
         }
+        if not check_sandbox() {
+            bail("Issues that prevent the Nix sandbox from working have been detected.")
+        }
     }
 
     trust $export NIX_SSL_CERT_FILE$
diff --git a/src/platform.ab b/src/platform.ab
index 82a028e..72f7e58 100644
--- a/src/platform.ab
+++ b/src/platform.ab
@@ -3,6 +3,7 @@
 // Environment-specific data retrieval utilities
 
 import { env_var_get, echo_warning } from "std/env"
+import { file_read }                 from "std/fs"
 import { split, join }               from "std/text"
 import { array_pop }                 from "std/array"
 
@@ -84,3 +85,36 @@ pub fun get_repo_root(): Text
         return self_dir
     }
 }
+
+fun read_sysctl(path: Text): Text?
+{
+    return silent file_read("/proc/sys/{path}")?
+}
+
+/// Return True if the system is capable of running the unprivileged Nixie
+/// sandbox, False otherwise.
+pub fun check_sandbox(): Bool
+{
+    let osname = get_osname()
+
+    if osname == "Linux" {
+        // Recent 6.x kernels lack this control as the feature is always enabled.
+        if trust read_sysctl("kernel/unprivileged_userns_clone") == "0" {
+            echo_warning("Unprivileged sandboxes are not allowed on this system.")
+            echo_warning("Running the following command as root may fix the issue:")
+            echo "    sysctl kernel.unprivileged_userns_clone=1"
+            return false
+        }
+        // This control will only exist if AppArmor is active.
+        if trust read_sysctl("kernel/apparmor_restrict_unprivileged_userns") == "1" {
+            echo_warning("AppArmor is restricting unprivileged sandboxes on this system.")
+            echo_warning("Running the following command as root may fix the issue:")
+            echo "    sysctl kernel.apparmor_restrict_unprivileged_userns=0"
+            return false
+        }
+    } else {
+        return true
+    }
+
+    return true
+}