stop using flake-utils

flake.lock

@@ -1,23 +1,5 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1687171271,
-        "narHash": "sha256-BJlq+ozK2B1sJDQXS3tzJM5a+oVZmi1q0FlBK/Xqv7M=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "abfb11bd1aec8ced1c9bb9adfe68018230f4fb3c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1687288566,
@@ -36,24 +18,8 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -1,12 +1,11 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
-    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
+  outputs = { self, nixpkgs }:
     let
+      system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
       atauPkgs = {
         atau-wallpapers = pkgs.callPackage ./atau-wallpapers/default.nix { };
@@ -14,10 +13,10 @@
       };
     in
     {
-        packages = rec {
+      packages.${system} = {
         default = atauPkgs.theme-platinum9;
       } // atauPkgs;
 
-        overlay = final: prev: { } // atauPkgs;
-      });
+      overlays.default = final: prev: atauPkgs;
+    };
 }