anchor.diff:        opusfile
       ];
   
  -  nativeBuildInputs = [ pkgconfig wrapQtAppsHook ];
  -
  -  enableParallelBuilding = true;
  -
     # comment out the tests
     preConfigure = ''
       sed -i 's/sub_test_svcore_/#sub_test_svcore_/' sonic-visualiser.pro
     '';
  +
  +  enableParallelBuilding = true;
   
     meta = with stdenv.lib; {
       description = "View and analyse contents of music audio files";
  
positive.code:       # portaudio
        libpulseaudio
        libmad
        libogg # ?
        libfishsound
        liblo
        libX11
  
negative.code: # TODO add plugins having various licenses, see http://www.vamp-plugins.org/download.html
  
  { stdenv, fetchurl, alsaLib, bzip2, fftw, libjack2, libX11, liblo
  , libmad, lrdf, librdf_raptor, librdf_rasqal, libsamplerate
  , libsndfile, pkg-config, libpulseaudio, qtbase, qtsvg, redland
  , rubberband, serd, sord, vamp-plugin-sdk, fftwFloat
  , capnproto, liboggz, libfishsound, libid3tag, opusfile
  , wrapQtAppsHook
  