diff --git a/config/env.ini b/config/env.ini
index 7448cc373..4b0795f8e 100644
--- a/config/env.ini
+++ b/config/env.ini
@@ -142,6 +142,8 @@ SPC_CMD_PREFIX_PHP_CONFIGURE="./configure --prefix= --with-valgrind=no --enable-
 SPC_CMD_VAR_PHP_EMBED_TYPE="static"
 ; EXTRA_CFLAGS for `configure` and `make` php
 SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS="-g -fstack-protector-strong -fpic -fpie -Werror=unknown-warning-option ${SPC_DEFAULT_C_FLAGS}"
+; minimum compatible macOS version (LLVM vars, availability not guaranteed)
+MACOSX_DEPLOYMENT_TARGET=12.0
 
 [freebsd]
 ; compiler environments