It looks like the upstream issue is here, and it mentions that it's a vendoring issue:
https://github.com/pypa/pip/issues/6799 ** Bug watch added: github.com/pypa/pip/issues #6799 https://github.com/pypa/pip/issues/6799 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1833229 Title: `--extra-index-url` not working for PIP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-pip/+bug/1833229/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
