I'm guessing that for whatever reason upstream has included their build directory in their sdist and that's causing this issue. I'll attach the full build log as well but the highlight is: mkdir: cannot create directory '/var/tmp/paludis/dev-python-rackspace-novaclient-1.4/work/rackspace-novaclient-1.4-python2_7/build': File exists
Created attachment 417122 [details] paludis build output
commit 750dfec7eaf72fd405eaf7ecf9d1d5a6df8208e9 Author: Justin Lecher <jlec@gentoo.org> Date: Mon Nov 23 11:23:44 2015 +0100 dev-python/rackspace-novaclient: Call mkdir with -p Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=565966 Package-Manager: portage-2.2.25 Signed-off-by: Justin Lecher <jlec@gentoo.org> https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=750dfec7eaf72fd405eaf7ecf9d1d5a6df8208e9