Note that those warnings are from Debian Stretch. Since it's oldstable, it's probably still OK to be building on it. What OS do the Koha CI servers use? David Cook Software Engineer Prosentient Systems Suite 7.03 6a Glen St Milsons Point NSW 2061 Australia Office: 02 9212 0899 Online: 02 8005 0595 From: dcook@prosentient.com.au <dcook@prosentient.com.au> Sent: Monday, 7 June 2021 4:23 PM To: 'koha-devel@lists.koha-community.org' <koha-devel@lists.koha-community.org> Cc: 'Mason James' <mtj@kohaaloha.com> Subject: Increasing Debian Package Compatibility Levels Hi all, I've been noticing lately some of the following warnings when I'm building Koha Debian packages: dh_install: Compatibility levels before 9 are deprecated (level 7 in use) dh_installdocs dh_installdocs: Compatibility levels before 9 are deprecated (level 7 in use) dh_installchangelogs dh_installchangelogs: Compatibility levels before 9 are deprecated (level 7 in use) dh_compress dh_fixperms dh_installdeb dh_installdeb: Compatibility levels before 9 are deprecated (level 7 in use) dh_gencontrol It seems to me that we should look at upping our compatibility level. We can see the changes between v7, 8, and 9 at https://manpages.debian.org/testing/debhelper/debhelper.7.en.html. At a glance, I think that we'd probably be OK moving up to 9 from 7. But we'd want to do some testing. David Cook Software Engineer Prosentient Systems Suite 7.03 6a Glen St Milsons Point NSW 2061 Australia Office: 02 9212 0899 Online: 02 8005 0595