Public bug reported: I think depends should be python-psycopg2 rather than psycopg2 (which is the source package name).
emurphy@alnair:~$ apt-cache show maas Package: maas Priority: optional Section: universe/net Installed-Size: 549 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Architecture: all Version: 0.1~bzr146+dfsg-0ubuntu1 Depends: postgresql-9.1, psycopg2 (= 2.4.1), python-django, python-django-piston, python-django-south, python-setproctitle, python-sphinx, python-twisted, python-zope.interface, rabbitmq-server, python2.7, python (>= 2.7.1-0ubuntu2), python (<< 2.8 ), python-pkg-resources Filename: pool/universe/m/maas/maas_0.1~bzr146+dfsg-0ubuntu1_all.deb Size: 81440 MD5sum: 16e71cd9fdf6b6137bcdb0ceff1ac3dd SHA1: f978bd717c57904caaab97f46d4c635887b73074 SHA256: 7ae1760acc297acc08268f4ac056d3cdb79ef65c9349391905f1b0691f25784c Description-en: The next step in the development of orchestra. It provides an easy to use UI to provision your Ubuntu servers. Homepage: https://launchpad.net/maas Description-md5: db5aba69c744180dcceb78e049c09b89 Bugs: https://bugs.launchpad.net/ubuntu/+filebug Origin: Ubuntu emurphy@alnair:~$ apt-cache show python-psycopg2 Package: python-psycopg2 Priority: optional Section: python Installed-Size: 598 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Original-Maintainer: Fabio Tranchitella <kob...@debian.org> Architecture: i386 Source: psycopg2 Version: 2.4.4-3 Provides: python2.7-psycopg2 Depends: python2.7, python (>= 2.7.1-0ubuntu2), python (<< 2.8), libc6 (>= 2.4), libpq5 (>= 8.3~) Recommends: python-egenix-mxdatetime Suggests: python-psycopg2-docs Filename: pool/main/p/psycopg2/python-psycopg2_2.4.4-3_i386.deb Size: 147982 MD5sum: 92a16ff55f69a30e0e8dd71428339cfe SHA1: 19e85652412aa5f98be20109b95f1a28d118e9e2 SHA256: dc7b2e1faf097e0de8efcc3218f44133eaaa5477c03bfefb175ab15923c46978 Description-en: Python module for PostgreSQL ** Affects: maas (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/937982 Title: Depends on psycopg2 instead of python-psycopg2, uninstallable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/maas/+bug/937982/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs