Comment 11 for bug 1848923

That path is used to detect if it has run before and skip re-execution as it isn't needed anymore then. A path change might be wanted, but would either need all sorts of maintscript magic to carry from old to new location if that has happened on a given system.

The option to use:
  CacheDirectory=pollinate
is very tempting.
Because if the path is there already this does nothing => no re-execution even on reboots.

But if running in an environment that has cleaned /var/cache then this will ensure it is "fine again". I think we can at this time also remove the mkdir from the postinst.

I'll prep that tomorrow and experiment with it ....