{
  description = "Wayland Wallpaper Daemon";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref?nixos-unstable";
  outputs = {nixpkgs, ...}: let
    systems = ["x86_64-linux" "aarch64-linux"];
    forAllSystems = f:
      builtins.listToAttrs (map (system: {
          name = system;
          value = f system;
        })
        systems);

    pkgsFor = system: nixpkgs.legacyPackages.${system};
  in {
    devShells = forAllSystems (system: let
      pkgs = pkgsFor system;
    in {
      default = pkgs.callPackage ./shell.nix {};
    });
  };
}