Comment 3 for bug 1777655

Michael, thanks for the comment and the commit revert. The issue indeed should be fixed on the deployment side and I've prepared the bugfix, which actually adds an ability to correctly build from the source in the environments without Internet access with own PyPi indexes and local constraints files.

Commit for the Rocky: https://review.openstack.org/#/c/577652/
and for the Queens: https://review.openstack.org/#/c/577653/

Both well tested on my CI and on the Zuul.