anchor.diff:  
     meta = with lib; {
       description = "Qt-based audio player that looks like Winamp";
  -    homepage = "http://qmmp.ylsoftware.com/";
  -    license = licenses.gpl2;
  +    homepage = "https://qmmp.ylsoftware.com/";
  +    license = licenses.gpl2Plus;
       platforms = platforms.linux;
       maintainers = [ maintainers.bjornfor ];
  -    repositories.svn = "http://qmmp.googlecode.com/svn/";
  +    repositories.svn = "https://svn.code.sf.net/p/qmmp-dev/code";
     };
   }
  
positive.code: , curl, libmms
  # input plugins
  , libmad, taglib, libvorbis, libogg, flac, libmpcdec, libmodplug, libsndfile
  , libcdio, cdparanoia, libcddb, faad2, ffmpeg_3, wildmidi
  # output plugins
  , alsaLib, libpulseaudio
  # effect plugins
  
negative.code:       curl libmms
        # input plugins
        libmad taglib libvorbis libogg flac libmpcdec libmodplug libsndfile
        libcdio cdparanoia libcddb faad2 ffmpeg wildmidi
        # output plugins
        alsaLib libpulseaudio
        # effect plugins
  