I agree that developers using virtualenv should be aware that it does not provude isolation for system dependancies. On two different projects, I've had to trac

I agree that developers using virtualenv should be aware that it does not provude isolation for system dependancies. On two different projects, I've had to track down a PIL bug on another developer's machine only to find that the wrong version of libjpg or libpng was installed. Solution? Install the right version. I've never experienced needing different versions of a system library, but if I did, LXC with btrfs sounds like an option worth trying to avoid the overhead of vagrant.