media-libs/gegl-0.0.20 just needs the keyword. media-libs/babl-0.0.22 needs a patch because one script which is called during compilation has /bin/sh hardcoded.
Created attachment 169102 [details] change /bin/sh to /bin/bash
Created attachment 169104 [details] ebuild which uses the patch
reported also on the babl bugzilla: http://bugzilla.gnome.org/show_bug.cgi?id=556972
Thanks! For a change like a shebang I usually use sed, but it's nothing more than taste. Added the keywords.