I tried to get the trunk version (14448) of xpra working under Arch Linux. The Problem is that the platform specific code in the setup.py (after line 1981) does not work correctly. Because "/bin/systemctl" exist also on arch linux the second if with is_Arch() is not used.
Oops, yes, sorry. r14445 was wrong, r14451 should be good.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1365