CFLAGS="-O2 -pipe" CXXFLAGS="" CHOST="x86_64-pc-linux-gnu" USE="mmx sse sse2 -perl -python" RUBY_TARGETS="ruby19 ruby20 ruby21 ruby22" GENTOO_MIRRORS="http://mirror.bytemark.co.uk/gentoo/" EMERGE_DEFAULT_OPTS="--color=n --nospinner" PORTDIR_OVERLAY="/ruby-tinderbox/overlay"