Allow to install local packages

[spinus]

I'm trying to have requirement like

-e ../local_package
# where inside `local_package` there is setup.py

Current pypi2nix 2.x omits this completely.
I tried multiple forms with file://, absolute path -e, ./../path.

[seppeljordan]

Hi, because of current limitations in requirement parsing your have to specify your requirements like so:

../local_package#egg=package_name
file:///path/to/package#egg=other_package

Let me know if that helped.