When I emerge distcc I also get gtk+ and xfree. I think this is unneeded, since
the only part of distcc that really needs these is distccmon-gnome, which is not
really a core part of distcc.
Steps to Reproduce:
USE="-*" emerge distcc -epv
disable gnome and gtk useflags and it won't install anything else that distcc.
My mistake. Sorry for any inconvenience caused.