anchor.diff:  #
   #  libksi = callPackage ../development/libraries/libksi { };
   #
  -#  libmad = callPackage ../development/libraries/libmad { };
  +  libmad = callPackage ../development/libraries/libmad { };
   #
   #  libmatchbox = callPackage ../development/libraries/libmatchbox { };
   #
  
positive.code: #
  #  faac = callPackage ../development/libraries/faac { };
  #
  #  faad2 = callPackage ../development/libraries/faad2 { };
  #
  #  farbfeld = callPackage ../development/libraries/farbfeld { };
  #
  
negative.code: #
  #  mda_lv2 = callPackage ../applications/audio/mda-lv2 { };
  #
    mediainfo = callPackage ../applications/misc/mediainfo { };
  #
  #  mediainfo-gui = callPackage ../applications/misc/mediainfo-gui { };
  #
  