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I found a corresponding bug report in Debian, so I've attached a bug watch. I also learned that this issue has been resolved and the documentation has been built in version 0.16.1-2 on Ubuntu 15.10 and later releases. See /usr/share/doc/python-sklearn-doc/html/stable/index.html ** Bug watch added: Debian Bug tracker #760730 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760730 ** Also affects: scikit-learn (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760730 Importance: Unknown Status: Unknown ** Changed in: scikit-learn (Ubuntu) Status: New => Fix Released ** Tags added: trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1324508 Title: documentation is not built in python-sklearn-doc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/scikit-learn/+bug/1324508/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs