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. Reproducible: Always Steps to Reproduce: 1. 2. 3.
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.