Please call into the support department at 1-800-821-2797 to speak with our 2nd level software support they should be able to get this feedback to the correct department.
Every once in a while we find a PKG that runs questionable/sloppy commands that can potentialy cause problems with non-Xerox files/folders on a Mac.
This comment on your postinstall script in your XeroxDrivers_5.10.1_2333.dmg driver smacks of reckless disregard for standards.
To whoever manages the team who creates your PKG installers for macOS, please tell your team to stop.
If you want/need to adjust owner:group and/or permissions on your software, go for it, just stop tampering with stuff that is not your software.
Learning moment? Let's hope so.
# should already be correct but let's make sure chown -R root:wheel "/Library/Printers/PPDs" chmod -R go-w "/Library/Printers/PPDs"