As suggested by N0rbert on askubuntu, installing compiz-core- abiversion-20170630 fixes the dependency problem and allows the updates to be installed without removing unity.
-- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1749839 Title: 16.04: Installation of the 2/15/18 update to compiz forced removal of unity and ubuntu-desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1749839/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp