Runtime file in /usr/share/openhab2/runtime/instances/

  • Platform information:
    • OS: archlinux
    • Java Runtime Environment: which java platform is used and what version
    • openHAB version: 2.1.0

I’ve installed openhab openhab using this package on a RO filesystem.
When launching openhab I’ve seen it tried to write to /usr/share/openhab2/runtime/instances/ during runtime.

Why is /usr/share/openhab2/runtime/instances/ not located in /run or /var/lib?
Is there a mean to configure its location?