anchor.diff:  
     nativeBuildInputs = [
       cmake
  +    pkg-config
       gettext
       smpq # used to build devilutionx.mpq
     ];
  
positive.code:     fmt
      libpng
      (SDL2.override { withStatic = true; })
    ];
  
    installPhase = ''
  
negative.code:   SDL_audiolib = fetchurl {
      url = "https://github.com/realnc/SDL_audiolib/archive/aa79660eba4467a44f9dcaecf26b0f0a000abfd7.tar.gz";
      sha256 = "0z4rizncp6gqsy72b3709zc9fr915wgcwnlx1fhhy7mrczsly630";
    };
  
    simpleini = fetchzip {
  