anchor.diff:      ];
   
       NIX_CFLAGS_LINK = "-lopenal -lfluidsynth";
  +
  +    cmakeFlags = [ "-DDYN_GTK=OFF" ];
   
       desktopItems = [
         (makeDesktopItem {
  
positive.code:     nativeBuildInputs = [ cmake makeWrapper pkg-config copyDesktopItems ];
      buildInputs = [
        SDL2
        libGL
        openal
        fluidsynth
        bzip2
        zlib
        libjpeg
        libsndfile
        libvpx
        mpg123
        game-music-emu
        zmusic
      ];
  
  
negative.code: { lib, stdenv, fetchFromGitHub, fetchpatch, cmake, makeWrapper, openal, fluidsynth
  , soundfont-fluid, libGL, SDL2, bzip2, zlib, libjpeg, libsndfile, libvpx, mpg123
  , game-music-emu, pkg-config, copyDesktopItems, makeDesktopItem, gtk3 }:
  
  let
    zmusic = stdenv.mkDerivation rec {
  