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I was able to reproduce this issue with python3-stevedore 1.1.0-0ubuntu1 on Ubuntu Vivid following the steps outlined above. While researching, I found that upstream has had a similar bug report quite recently and it seems like they are still building for python 2.6 (see bug 1372433 for details). However, I don't believe Ubuntu is still shipping 2.6, so it might be possible to patch the package. I've marked this issue as affecting upstream as well, to hear what they have to say. ** Also affects: python-stevedore Importance: Undecided Status: New ** Changed in: stevedore (Ubuntu) Status: New => Confirmed ** Tags added: vivid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1401783 Title: Requirement "argparse" breaks package import To manage notifications about this bug go to: https://bugs.launchpad.net/python-stevedore/+bug/1401783/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs