Install patched yapps for test from an http archive Instead of git which require git to be installed. Also downloading archive is faster than cloning the repository.

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))