gistfile1.txt

$ pip --version
pip 1.5 from /opt/path/to/python

$ pip install -I pil --allow-external pil
Downloading/unpacking pil
  Could not find any downloads that satisfy the requirement pil
  Some insecure and unverifiable files were ignored (use --allow-unverified pil to allow).
Cleaning up...
No distributions at all found for pil
Storing debug log for failure in ..../.pip/pip.log