diff --git a/nixos/modules/services/x11/window-managers/metacity.nix b/nixos/modules/services/x11/window-managers/metacity.nix
index 6fd9f00374ad..b3c24a9a5bba 100644
--- a/nixos/modules/services/x11/window-managers/metacity.nix
+++ b/nixos/modules/services/x11/window-managers/metacity.nix
@@ -1,7 +1,5 @@
 { config, lib, pkgs, ... }:
 
-with lib;
-
 let
 
   cfg = config.services.xserver.windowManager.metacity;
@@ -10,12 +8,12 @@ in
 
 {
   options = {
-    services.xserver.windowManager.metacity.enable = mkEnableOption "metacity";
+    services.xserver.windowManager.metacity.enable = lib.mkEnableOption "metacity";
   };
 
-  config = mkIf cfg.enable {
+  config = lib.mkIf cfg.enable {
 
-    services.xserver.windowManager.session = singleton
+    services.xserver.windowManager.session = lib.singleton
       { name = "metacity";
         start = ''
           ${metacity}/bin/metacity &