fix: darwinConfigurations.X is not an attribute set

flake.lock

@@ -193,26 +193,6 @@
         "type": "github"
       }
     },
-    "nil": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1751341694,
-        "narHash": "sha256-zXag1+8iZC3H5yVFP7KhIi4ps9z8xKrFIkyaeXlZ7Uo=",
-        "owner": "oxalica",
-        "repo": "nil",
-        "rev": "b043bfe1f3f4c4be4b688e24c5ae96e81f525805",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "nil",
-        "type": "github"
-      }
-    },
     "nix": {
       "inputs": {
         "flake-compat": "flake-compat_2",
@@ -358,7 +338,6 @@
         "fenix": "fenix",
         "ghostty": "ghostty",
         "home-manager": "home-manager",
-        "nil": "nil",
         "nix": "nix",
         "nix-darwin": "nix-darwin",
         "nixpkgs": "nixpkgs_2"

lib/system.nix

@@ -47,10 +47,10 @@ in
 {
   system =
     os: configFile:
-    if os == "darwin" then
+    (if os == "darwin" then
       super.darwinSystem
     else
-      super.nixosSystem {
+      super.nixosSystem) {
         inherit specialArgs;
 
         modules =