Comment # 6 on bug 1215538 from Dr. Werner Fink

(In reply to Thorsten Kukuk from comment #5)
> (In reply to Dr. Werner Fink from comment #4)
> > (In reply to Bruno Pitrus from comment #3)
> > > Because the dependency of `man` on `systemd` is unnecessary.
> > 
> > You mean that I should ignore that now man or better its mandb command will
> > not be executed without systemd timer?
> 
> On WSL and in containers mandb will never be executed by systemd timer, even
> with your Requires. Because systemd does not run in this environments, even
> if you add it as Requires.
> On a "standard" installation, systemd is always installed and running, we
> don't support anything else.

The problem is that running mandb in %post or %posttrans to create man data
base  takes ages therefore I use due several bug reports now systemd API.

Are there possibilities to detect in %post or %posttrans during installation
time what surrounding environment will be used (WSL, container, or systemd
based).