This may be patched upstream, but it is not present in the version which today installs on Focal 20.04 (reported as 1:2.27ubuntu1).
One reason might be that https://code.launchpad.net/~vcs- imports/debmirror/trunk (which is about this package, right?) reports that "Last successful import was on 2014-11-07. " Possibly this is caused by the fact that the upstream repo has moved from git://git.debian.org/collab-maint/debmirror.git (listed on that page) to https://salsa.debian.org/debian/debmirror as shown in comment #6. Another reason why Focal cannot mirror itself successfully is reported in this bug: https://bugs.launchpad.net/ubuntu/+source/debmirror/+bug/1879348 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821251 Title: please add cnf support to debmirror To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt-mirror/+bug/1821251/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs