diff --git a/modules/top-level/output.nix b/modules/top-level/output.nix
index f2b8e25a..97984dcc 100644
--- a/modules/top-level/output.nix
+++ b/modules/top-level/output.nix
@@ -240,7 +240,7 @@ in
         ) config.env)
         ++ (optional (
           config.extraPackages != [ ]
-        ) ''--prefix PATH : "${lib.makeBinPath config.extraPackages}"'')
+        ) ''--suffix PATH : "${lib.makeBinPath config.extraPackages}"'')
         ++ (optional config.wrapRc ''--add-flags -u --add-flags "${initFile}"'')
       );