$ python -m pip.__main__ install mccabe==0.2.1
DEPRECATION: --download-cache has been deprecated and will be removed in the future. Pip now automatically uses and configures its cache.
Downloading/unpacking mccabe==0.2.1
@@@  Getting page: https://pypi.python.org/simple/mccabe/
@@@  Getting page: https://pypi.python.org/simple/mccabe/0.2.1
@@@  Getting page: https://pypi.python.org/simple/mccabe/
  Using cached mccabe-0.2.1.tar.gz
  Running setup.py (path:/home/buck/venv/pip/build/mccabe/setup.py) egg_info for package mccabe

Installing collected packages: mccabe
  Running setup.py install for mccabe

Successfully installed mccabe
Cleaning up...