anchor.diff:      description = "View and analyse contents of music audio files";
       homepage = http://www.sonicvisualiser.org/;
       license = "GPLv2";
  -    maintainers = [ stdenv.lib.maintainers.marcweber 
  -      stdenv.lib.maintainers.goibhniu ];
  +    maintainers = 
  +      [ stdenv.lib.maintainers.marcweber 
  +        stdenv.lib.maintainers.goibhniu 
  +      ];
       platforms = stdenv.lib.platforms.linux;
     };
   }
  
positive.code:   buildInputs =
      [ libsndfile qt4 fftw /* should be fftw3f ??*/ bzip2 librdf rubberband
        libsamplerate vampSDK alsaLib librdf_raptor librdf_rasqal redland
        # optional
        jackaudio
        pkgconfig
        # portaudio
        pulseaudio
        libmad
  
negative.code: # TODO add plugins having various licenses, see http://www.vamp-plugins.org/download.html
  
  { stdenv, fetchurl, alsaLib, bzip2, fftw, jackaudio, libX11, liblo
  , libmad, libogg, librdf, librdf_raptor, librdf_rasqal, libsamplerate
  , libsndfile, makeWrapper, pkgconfig, pulseaudio, qt4, redland
  , rubberband, vampSDK 
  }:
  
  stdenv.mkDerivation rec {
  