{
  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:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        atauPkgs = {
          atau-wallpapers = pkgs.callPackage ./atau-wallpapers/default.nix { };
          theme-platinum9 = pkgs.callPackage ./theme-platinum9/default.nix { };
        };
      in
      {
        packages = rec {
          default = atauPkgs.theme-platinum9;
        } // atauPkgs;

        overlay = final: prev: { } // atauPkgs;
      });
}