[Rdo-list] python3 packaging and version numbering issues

Hi list, While debugging a build issue for openstack-nova in Delorean (http://trunk.rdoproject.org/f24/72/76/727656d2f59e26a8c86afdad9b3709ab8ef...) I have found a very strange behaviour related to package versions, and I need some help understanding what is going on. If we have a package in Delorean where we recently added a python3 subpackage (https://review.gerrithub.io/#/q/status:merged+topic:py3) *and* there is a package already in the Fedora Rawhide repo *and* that package does not have python2/python3 subpackages, such as python-oslo-db, we see the following: - The older package release (2.6.0 in this case) gets installed as part of the BuildRequires installation - However, the proper Provides and Obsoletes are present in the Delorean package - Actually, when the package is not directly a BuildRequires but a dependency for one of them (e.g. python-oslo-concurrency), the newer package gets installed. I've been able to reproduce this behaviour locally, by setting up a Fedora machine with the Delorean repo and trying: # dnf install python-oslo-db (the old version gets installed) # dnf update python-oslo-db (it fetches the newer python2-oslo-db from Delorean) Even better, if I edit the openstack-nova spec file to set BuildRequires: python-oslo-db >= 4.1.0 instead of an unversioned BR, I will get the newer package. Is this an issue with our packages, a dnf builddep bug, or any other mistake? Thanks, Javier