anchor.diff:    ];
   
     buildInputs = [
  -    libpulseaudio
       pulseaudio
       ffmpeg_4
       libtool
  
positive.code: { stdenv
  , runCommand
  , fetchFromGitHub
  , libpulseaudio
  , pulseaudio
  , pkgconfig
  , ffmpeg_4
  
negative.code:     for so in $out/lib/pulse-${pulseaudio.version}/modules/*.so; do
        orig_rpath=$(patchelf --print-rpath "$so")
        patchelf \
          --set-rpath "${lib.getLib ffmpeg_4}/lib:$out/lib/pulse-${pulseaudio.version}/modules:$orig_rpath" \
          "$so"
      done
    '';
  