anchor.diff:      libsamplerate
       libsndfile
       boost
  +    dbus
       fftwFloat
       zita-convolver
       hicolor-icon-theme
  
positive.code:   '';
  
    preFixup = ''
      addToSearchPath GST_PLUGIN_SYSTEM_PATH_1_0 $out/lib/gstreamer-1.0
  
      gappsWrapperArgs+=(
        --set LV2_PATH "${stdenv.lib.makeSearchPath "lib/lv2" lv2Plugins}"
        --set LADSPA_PATH "${stdenv.lib.makeSearchPath "lib/ladspa" ladspaPlugins}"
  
negative.code: , libsndfile
  , libebur128
  , boost
  , dbus
  , fftwFloat
  , calf
  , zita-convolver
  