coreos/coreos-overlay — pull request #608 by philips (2014-05-16 01:59:57+00:00)
Title: fix(app-emulation/docker): add TMPDIR=/var/tmp

This fixes the issue reported here where /tmp runs out os space during a
docker save

https://github.com/coreos/coreos-vagrant/issues/49#issuecomment-43287780