diff --git a/nixos/modules/security/wrappers/default.nix b/nixos/modules/security/wrappers/default.nix
index e63f19010de..169ef744262 100644
--- a/nixos/modules/security/wrappers/default.nix
+++ b/nixos/modules/security/wrappers/default.nix
@@ -98,7 +98,7 @@ let
 
       # Prevent races
       chmod 0000 "$wrapperDir/${program}"
-      chown ${owner}.${group} "$wrapperDir/${program}"
+      chown ${owner}:${group} "$wrapperDir/${program}"
 
       # Set desired capabilities on the file plus cap_setpcap so
       # the wrapper program can elevate the capabilities set on
@@ -126,7 +126,7 @@ let
 
       # Prevent races
       chmod 0000 "$wrapperDir/${program}"
-      chown ${owner}.${group} "$wrapperDir/${program}"
+      chown ${owner}:${group} "$wrapperDir/${program}"
 
       chmod "u${if setuid then "+" else "-"}s,g${if setgid then "+" else "-"}s,${permissions}" "$wrapperDir/${program}"
     '';