diff --git a/common/gaming.nix b/common/gaming.nix
index 80c587d..ced414d 100644
--- a/common/gaming.nix
+++ b/common/gaming.nix
@@ -56,7 +56,7 @@ in
           osu-lazer-bin
         ];
       })
-    ] ++ optional (factorio.passthru.updateScript != null) factorio;
+    ] ++ optional (!isNull factorio.passthru.updateScript) factorio;
   };
 
   options.grimmShared.gaming = mkEnableOption "enables steam, heroic, prism and gamemoded";