On the wiki: http://www.openembedded.org/wiki/OEandYourDistro#Gentoo_instructions it says for gentoo users to: emerge -n \ psyco \ patch \ make \..... psyco is a "dead project and no longer maintained". It was suggested to use pypy and I succesfully built the oe-core-X11 for the raspberry pi emerge -n \ pypy \ patch \ make \.....