An open PR for this upstream is here: https://github.com/docker/compose/pull/3404/commits/abbbff6e0b969974e7d5eff0061eab1ba7a03af9 Though some discussion is taking place on the PR, Fedora and MacPorts have gone ahead and made this change. Removes quite a few blockers between docker-compose and other python apps, notably any of the openstack clients are affected.
compose is now at 1.8.1 and it's still impossible to install it along openstack because of blockers related to dev-python/requests
Please test with 1.10.0_rc2
This can be closed at this point as newer docker-compose versions are in-tree with higher limits on dev-python/requests. A new issue https://bugs.gentoo.org/show_bug.cgi?id=610644 is open for that.