package chaining is broken

[abcdenis]

Hi,
what I did:

• make library_aaa with setuptools-git-version (version_format='{tag}.dev{commitcount}+{gitsha}' etc)
• build it & upload to my local PIP
• it works fine with some service
• make library_bbb with setuptools-git-version with section:

install_requires=[
        'library_aaa==0.0.7'
    ],

• upon installing requirements for service that requires library_bbb, pip module downloads library_aaa into temporary directory and tries to make a wheel from it - runs setup.py which failed because temporary directory does not contain .git folder.

fatal: not a git repository (or any of the parent directories): .git