/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/ is in python3-maas-provisioningserver 2.4.0~beta2-6865-gec43e47e6-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/__init__.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/bootloader.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/caringo.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/centos.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/custom.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/rhel.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/suse.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/ubuntu.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/ubuntucore.py
/usr/lib/python3/dist-packages/provisioningserver/drivers/osystem/windows.py