anchor.diff:        ocamlPackages.portaudio
         ocamlPackages.pulseaudio
         ocamlPackages.shine
  +      ocamlPackages.samplerate
         ocamlPackages.soundtouch
         ocamlPackages.speex
         ocamlPackages.srt
  
positive.code:       ocamlPackages.ladspa
        ocamlPackages.lame
        ocamlPackages.lastfm
        ocamlPackages.lo
        ocamlPackages.mad
        ocamlPackages.magic
  
negative.code:       ocamlPackages.tsdl-ttf
  
        # Undocumented dependencies
        ocamlPackages.graphics
        ocamlPackages.cohttp-lwt-unix
      ];
  
  