nix-custom/packages/yorha-grub-theme.nix

{
  inputs,
  name,
  pkgs,
  resolution ? "3840x2160",
}:
assert builtins.any (s: resolution == s) ["1920x1080" "2256x1504" "2560x1440" "3840x2160"];
  pkgs.stdenv.mkDerivation {
    inherit name;
    src = inputs.${name};
    installPhase = ''
      runHook preInstall
      mkdir -p $out/
      cp -r yorha-${resolution}/* $out/
      runHook postInstall
    '';
  }