When trying to bootstrap gentoo prefix on Debian Squeeze 6.0.7 x86_64 as of 2013/09/24 the bootstrap hangs in some kind of infinite loop while installing sys-kernel/linux-headers-3.9. The last line of the output: '>>> Install linux-headers-3.9 into /home/user/gentoo/var/tmp/portage/sys-kernel/linux-headers-3.9/image/ category sys-kernel' The command that's using the cpu power seems to be '/home/user/gentoo/bin/bash /home/user/gentoo/usr/lib/portage/bin/ebuild-helpers/unprivileged/chown -R 0:0 3.9 gentoo-headers-base-3.9' Seems like this process is trying to change the ownership to root which won't be possible as normal user as is the case with gentoo prefix. Workaround: Killing this process makes the installation proceed!
I think this is fixed in more recent versions of Portage. We'll have to upgrade the portage which is used during bootstrap.
Fixed in latest snapshot.