anchor.diff:    '';
   
     doCheck = true;
  +
  +  passthru.updateScript = nix-update-script {
  +    attrPath = pname;
  +  };
   
     meta = with lib; {
       homepage = "https://github.com/celluloid-player/celluloid";
  
positive.code:     python3
      wrapGAppsHook4
    ];
    buildInputs = [
      libepoxy
      glib
      gtk4
      wayland
      mpv
    ];
  
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "celluloid";
    version = "0.24";
  
    src = fetchFromGitHub {
      owner = "celluloid-player";
      repo = "celluloid";
      rev = "v${version}";
      hash = "sha256-8Y/dCeoS29R1UHwmLOp0d+JNNC4JH5pLpiqfBZU+kLI=";
    };
  
    nativeBuildInputs = [
  