virtualenv --no-site-packages is not working for me
Question: 
    virtualenv --no-site-packages v1
    
    cd v1\Scripts
    
    activate.bat
    
    python -c "import django" # - no problem here
    

Why does it see the Django package??? It should give me an import error,
right?


Answer: Just unset `PYTHONPATH` environment variable. The idea of virtualenv is that
you can create your own environment (fully isolated or extending the default
one) so you don't have to mess with that.

As someone noticed there's already been [a similar question on
SO](http://stackoverflow.com/questions/2961103/virtualenv-on-windows-not-over-
riding-installed-package/2963017#2963017). Read it if you need a better
explanation.

