Get pip to work with git and github repository

The problem is not with pip, is with setuptools. The responsible for the setup() call is setuptools package (setuptools or distribute project).

Neither setuptools or distribute understand that kind of url, they understand tarballs/zip files.

Try pointing to Github's download url - usually a zip file.

Your dependency_links entry is probably going to look like:

dependency_links=[
    'https://github.com/user/app_b/archive/0.1.1.zip#egg=app_b-0.1.1'
]

For more information take a look at http://peak.telecommunity.com/DevCenter/setuptools#dependencies-that-aren-t-in-pypi

From pip documentation -

pip currently supports cloning over git, git+http and git+ssh:

git+git://git.myproject.org/MyProject#egg=MyProject
git+http://git.myproject.org/MyProject#egg=MyProject
git+ssh://git.myproject.org/MyProject#egg=MyProject

Try replacing git+https with git+git.