anchor.diff:    nativeBuildInputs = [
       makeWrapper
       perl
  -    pythonPackages.python
  -    pythonPackages.docutils
  +    python3Packages.python
  +    python3Packages.docutils
       waf
       which
     ];
  
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
  , rubberband
  , samba_client
  , sdl
  