anchor.diff:      cups
       dbus
       double-conversion
  +    fixesproto
       fontconfig
       freetype
       glib
  
positive.code: , bison
  , fetchurl
  , gperf
  , perl
  , python2
  , which
  
  , alsa-lib
  , bluez
  , cups
  , dbus
  , double-conversion
  , expat
  , fontconfig
  , freetype
  , glib
  
negative.code: , harfbuzz_lib
  , hunspell
  , icu
  , inputproto
  , libcap
  , libdrm
  , libevdev
  