Open Build Service fails building Ubuntu 22/23 deb packages

[gdha]

• ReaR version ("/usr/sbin/rear -V"): rear-2.7 (latest git version)

• If your ReaR version is not the current version, explain why you can't upgrade:

• OS version ("cat /etc/os-release" or "lsb_release -a" or "cat /etc/rear/os.conf"): Ubuntu 22/23

• ReaR configuration files ("cat /etc/rear/site.conf" and/or "cat /etc/rear/local.conf"): n/a

• Hardware vendor/product (PC or PowerNV BareMetal or ARM) or VM (KVM guest or PowerVM LPAR): Open Build Service

• System architecture (x86 compatible or PPC64/PPC64LE or what exact ARM device): x66_64

• Description of the issue (ideally so that others can reproduce it):
  Ubuntu package building fails

[   35s] Writing //usr/src/packages/SOURCES.DEB/rear_2.7-0git.4925.f21a6d6.master.dsc
[   35s] dpkg-source: warning: extracting unsigned source package (/usr/src/packages/SOURCES.DEB/rear_2.7-0git.4925.f21a6d6.master.dsc)
[   35s] dpkg-source: info: extracting rear in /usr/src/packages/BUILD
[   35s] dpkg-source: info: unpacking rear_2.7.orig.tar.gz
[   36s] dpkg-source: info: applying rear_2.7-0git.4925.f21a6d6.master.diff.gz
[   36s] -----------------------------------------------------------------
[   36s] ----- building rear.dsc (user abuild)
[   36s] -----------------------------------------------------------------
[   36s] -----------------------------------------------------------------
[   36s] dpkg-buildpackage: info: source package rear
[   36s] dpkg-buildpackage: info: source version 2.7-0git.4925.f21a6d6.master
[   36s] dpkg-buildpackage: info: source distribution stable
[   36s] dpkg-buildpackage: info: source changed by openSUSE Build Service <obs@relax-and-recover.org>
[   36s]  dpkg-source --before-build .
[   36s] dpkg-buildpackage: info: host architecture amd64
[   37s]  fakeroot debian/rules clean
[   37s] dh clean
[   37s] dh: error: Compatibility levels before 7 are no longer supported (level 5 requested)
[   37s] make: *** [debian/rules:4: clean] Error 25
[   37s] dpkg-buildpackage: error: fakeroot debian/rules clean subprocess returned exit status 2
[   37s] ### VM INTERACTION START ###
[   37s] [   29.640618][    T1] sysrq: Power Off
[   37s] [   29.644286][   T16] reboot: Power down
[   37s] ### VM INTERACTION END ###
[   37s] 
[   37s] cloud113 failed "build rear.dsc" at Thu Oct 27 10:08:39 UTC 2022.
[   37s] 

• Workaround, if any: Under investigation

[github-actions]

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[pcahyna]

I believe OBS was removed in #3056, is that correct? Although the error likely points to a more general problem with Ubuntu builds that should be fixed nevertheless.

[github-actions]

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