/lib/ is in nfs-common 1:1.3.4-2.1ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/lib/systemd/
/lib/systemd/system/
/lib/systemd/system/auth-rpcgss-module.service
/lib/systemd/system/nfs-client.target
/lib/systemd/system/nfs-config.service
/lib/systemd/system/nfs-idmapd.service
/lib/systemd/system/nfs-utils.service
/lib/systemd/system/proc-fs-nfsd.mount
/lib/systemd/system/rpc-gssd.service
/lib/systemd/system/rpc-statd-notify.service
/lib/systemd/system/rpc-statd.service
/lib/systemd/system/rpc-svcgssd.service
/lib/systemd/system/run-rpc_pipefs.mount
/lib/systemd/system/nfs-common.service