It's not in wily anymore, don't know about older releases, but if it's not fixed in vivid yet, it will be fixed soon, as the build system automatically updates the list.
** Changed in: python-apt (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to python-apt in Ubuntu. https://bugs.launchpad.net/bugs/1463679 Title: mirror.anl.gov no longer works Status in python-apt package in Ubuntu: Fix Released Bug description: /usr/share/python-apt/templates/Debian.mirrors maintains a list of mirrors; at least one mirror no longer mirrors software. Please remove mirror.anl.gov from this file: http://mirror.anl.gov/pub/ubuntu- iso/DVDs/ubuntu/ Thanks ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: python-apt-common 0.9.3.5ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-46.79-generic 3.13.11-ckt15 Uname: Linux 3.13.0-46-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.11 Architecture: amd64 CurrentDesktop: Unity Date: Tue Jun 9 23:15:12 2015 InstallationDate: Installed on 2012-10-18 (965 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) PackageArchitecture: all SourcePackage: python-apt UpgradeStatus: Upgraded to trusty on 2014-04-12 (424 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1463679/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp