anchor.diff:  
     buildInputs = [
       chromaprint fftw flac faad2 glibcLocales mp4v2 libid3tag libmad libopus libshout libsndfile
  -    libusb1 libvorbis pkgconfig portaudio portmidi protobuf qt4
  +    libusb1 libvorbis opusfile pkgconfig portaudio portmidi protobuf qt4
       rubberband scons sqlite taglib upower vampSDK
     ];
   
  
positive.code:     "build=release"
      "qtdir=${qt4}"
      "faad=1"
    ];
  
    buildPhase = ''
  
negative.code: { stdenv, fetchFromGitHub, makeWrapper, chromaprint, fetchpatch
  , fftw, flac, faad2, glibcLocales, mp4v2
  , libid3tag, libmad, libopus, libshout, libsndfile, libusb1, libvorbis
  , opusfile
  , pkgconfig, portaudio, portmidi, protobuf, qt4, rubberband, scons, sqlite
  , taglib, upower, vampSDK
  }:
  