anchor.diff: -{ stdenv, mkDerivation, fetchFromGitHub, chromaprint
  +{ stdenv, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
   , fftw, flac, faad2, glibcLocales, mp4v2
   , libid3tag, libmad, libopus, libshout, libsndfile, libusb1, libvorbis
   , libGLU, libxcb, lilv, lv2, opusfile
  
positive.code: , qtx11extras, rubberband, scons, sqlite, taglib, upower, vamp-plugin-sdk
  }:
  
  mkDerivation rec {
    pname = "mixxx";
    version = "2.2.3";
  
negative.code:   };
  
    buildInputs = [
      chromaprint fftw flac faad2 glibcLocales mp4v2 libid3tag libmad libopus libshout241 libsndfile
      libusb1 libvorbis libxcb libGLU lilv lv2 opusfile pkgconfig portaudio portmidi protobuf qtbase qtscript qtsvg
      qtx11extras rubberband scons sqlite taglib upower vamp-plugin-sdk
    ];
  