The UCR templates of univention-system-setup have to be python3-compatible.
univention-system-setup.yaml f4c50950d260 | YAML Bug #51025 univention-system-setup (12.0.2-20) 91b58959dcc8 | Bug #51025: make UCR templates compatible to python3
Verified: * Code review * Package built & installable (also univention-system-setup-boot) * Advisory
Also: new dependencies (python-six and python3-six) are in "maintained" in UCS 4.
<http://errata.software-univention.de/ucs/4.4/519.html>