Hi Owen, I could not find a libzip4 package whose version is 1:1.0.1-0+16.04+xenial+build6 anywhere in the Ubuntu official archive, so I'm assuming that this is a third-party package you have installed in your system (and as such, we don't provide support for it).
But just to reply to your question, the third-party package you're using has a version that contains an epoch. This is what's causing dpkg to consider it the most recent version of all libzip4 packages you have available to be installed. You can see that by: $ dpkg --compare-versions '1.7.3-1ubuntu1' gt '1:1.0.1-0+16.04+xenial+build6' $ echo $? 1 So yeah, dpkg is doing the right thing here; the problem is with the version of the third-party libzip4 package. Having said all that, and since this is not a problem with an official Ubuntu package, I'm closing this bug as Invalid. Thanks. ** Changed in: php-defaults (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1971688 Title: PHP 8.1 zip module asserting with dependency problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/php-defaults/+bug/1971688/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs