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Confirmed - I have followed your reproduction steps and hit the same issue. The underlying reason however is not in the python3.4 nor mod-wsgi packages. The issue is that the Docker "ubuntu:trusty" image seems to include python3.4 version 3.4.3-1ubuntu1~14.04.1 from trusty-proposed but does not (and should not) have trusty-proposed enabled in sources.list. When apt later wants to install a matching libpython3.4, it cannot find it. So this is a bug in the Docker image, which incorrectly includes packages from Ubuntu from trusty-proposed. I'll mark this Invalid against the mod-wsgi and apache2 packages in Ubuntu as there is no fix to be made in those packages. I'll add a generic Ubuntu task so we don't forget this issue until I can track down who needs to be fixing the Docker image. ** Changed in: mod-wsgi (Ubuntu) Status: New => Invalid ** Changed in: python3.4 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mod-wsgi in Ubuntu. https://bugs.launchpad.net/bugs/1505164 Title: python3.4 3.4.3 prevents installation of libapache2-mod-wsgi-py3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mod-wsgi/+bug/1505164/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs