anchor.diff:  , openal
   , opengl-dummy
   , pulseaudio_lib
  -, pythonPackages
  +, python3Packages
   , rubberband
   , samba_client
   , sdl
  
positive.code: 
    preFixup = /* Ensure youtube-dl is available in $PATH for MPV */ ''
      wrapProgram $out/bin/mpv \
        --prefix PATH : "${pythonPackages.youtube-dl}/bin"
    '';
  
    meta = with lib; {
  
negative.code:     openal
      opengl-dummy
      pulseaudio_lib
      python3Packages.youtube-dl
      rubberband
      samba_client
      sdl
  