diff --git a/configuration.nix b/configuration.nix
index 76c2de6..7f0031c 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -139,7 +139,7 @@ in {
         ];
         groups = ["wheel"];
       }
-    ];
+    ];;
   };
 
   # Install firefox.