diff --git a/benchbuild/settings.py b/benchbuild/settings.py
index 97cf3ad89..7e8bc03af 100644
--- a/benchbuild/settings.py
+++ b/benchbuild/settings.py
@@ -234,12 +234,16 @@
         "default": True
     },
     "multithread": {
-        "desc": "Hint SLURM to disable multithreading. False adds --hint=nomultithread.",
-        "default": False
+        "desc":
+            "Hint SLURM to disable multithreading. False adds --hint=nomultithread.",
+        "default":
+            False
     },
     "turbo": {
-        "desc": "Enable Intel Turbo Boost via SLURM. False adds --pstate-turbo=off.",
-        "default": False
+        "desc":
+            "Enable Intel Turbo Boost via SLURM. False adds --pstate-turbo=off.",
+        "default":
+            False
     },
     "logs": {
         "desc": "Location the SLURM logs will be stored",
@@ -384,13 +388,15 @@
     },
     "storage_driver": {
         "default": None,
-        "desc": "Storage driver for containers."
-                "If 'null' use podman's default."
+        "desc":
+            "Storage driver for containers."
+            "If 'null' use podman's default."
     },
     "storage_opts": {
         "default": [],
-        "desc": "Storage options for containers."
-                "If 'null', ignore 'storage.conf'."
+        "desc":
+            "Storage options for containers."
+            "If 'null', ignore 'storage.conf'."
     },
     "seccomp_config": {
         "default": None,
@@ -517,6 +523,10 @@
 }
 
 CFG["versions"] = {
+    "separator": {
+        "default": ",",
+        "desc": "Separator used to join versions."
+    },
     "full": {
         "default": False,
         "desc": "Ignore default sampling and provide full version exploration."
diff --git a/benchbuild/source/base.py b/benchbuild/source/base.py
index 7a851a8d2..4cc0697cf 100644
--- a/benchbuild/source/base.py
+++ b/benchbuild/source/base.py
@@ -175,7 +175,7 @@ def to_str(*variants: Variant) -> str:
     Returns:
         string representation of all input variants joined by ','.
     """
-    return ",".join([str(i) for i in variants])
+    return str(CFG["versions"]["separator"]).join([str(i) for i in variants])
 
 
 class Fetchable(Protocol):