{ lib, config, pkgs, ... }:

{
  options = {
    this.overlays.g45_h264.enable = lib.mkEnableOption "intel-vaapi-driver with h264 support on gm45";
  };

  config = lib.mkIf config.this.overlays.g45_h264.enable {
    nixpkgs.overlays = [
      (final: prev: {
        intel-vaapi-driver =
          prev.intel-vaapi-driver.overrideAttrs
            (attrs: attrs // {
              src = pkgs.fetchzip {
                url = "https://bitbucket.org/alium/g45-h264/downloads/intel-driver-g45-h264-2.4.1.tar.gz";
                sha256 = "h23mQV7WdtQjhkpUlnyHcwVTz+T3BZSuqfuKru4LClo=";
                name = "intel-driver-g45-h264-2.4.1-source";
              };
              version = "2.4.1-g45-h264";
              preBuild = "patchShebangs src";
            });
      })
    ];
  };
}