Hallo Merlijn van Deen:
I did try adding depency links as described by [2]:
dependency_links=[ 'git+ https://git.wikimedia.org/git/pywikibot/externals/httplib2.git#egg=httplib2-... ' ],
I realised today there was a simpler solution than getting setuptools/pip to understand git: git.wikimedia.org has a .tar.gz download option. As such, I have submitted
Awesome, one less thing on my todo list without me doing anything :-)
which suggests https://git.wikimedia.org/zip/?r=pywikibot/externals/httplib2.git&format... as download link.
Ah, that was way too obvious for me to find.