Thanks for reporting. Based on the version number offered (2:1.9.12-1~zzartful2), this sounds like it comes from a PPA. It doesn't seem to match the official Ubuntu packages at least (https://launchpad.net/ubuntu/+source/jackd2). Could you please run `sudo apt update`, and if the problem persists, check `apt policy libjack-jackd2-dev libjack-jackd2-0`. This will tell you which package versions are available and where they can be installed from.
When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. ** Changed in: jackd2 (Ubuntu) Status: New => Incomplete ** Tags added: artful unmetdeps -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to jackd2 in Ubuntu. https://bugs.launchpad.net/bugs/1747220 Title: unsatisfied dependencies installing libjack-jackd2-dev Status in jackd2 package in Ubuntu: Incomplete Bug description: I have a broken package message in Ubuntu 17.10 when trying to install libjack-jackd2-dev: (text from console translated from spanish): The following packages has broken links: libjack-jackd2-dev : Depends: libjack-jackd2-0 (= 1.9.10+20150825git1ed50c92~dfsg-5ubuntu1) but 2:1.9.12-1~zzartful2 is going to be installed E: Fatal errors couldn't be repaired, broken packages retained. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jackd2/+bug/1747220/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp