The new and improved setup.py support fails on Python 2.6, due to the

inability to directly call python -m pip. Instead, we have to specify

the specific module by calling python -m pip.__main__. This is not

required for Python 2.7, but works fine there.
This change will not be merged to release-0.10.x.

Built the package successfully on both Python 2.6 and 2.7.