travis-ci/travis-build — pull request #31 by michaelklishin (2012-08-17 10:06:01+00:00)
Title: Add a way to switch between virtualenvs with and without SSP

We previously created only one virtualenv per Python, without --system-site-packages. However,
some dependencies cannot be installed via pip. So in the end we settled on having two sets
of virtualenvs and the way to alternate between them.

Depends on travis-cookbooks@54f5ad4f0e43438fee83efc08b30d88bc558839d being deployed (will be later today).