[Unit]
Description=Import lastlog data into lastlog2 database
Documentation=man:lastlog2(8)
After=local-fs.target
ConditionPathExists=/var/log/lastlog
ConditionPathExists=!/var/lib/lastlog/lastlog2.db

[Service]
Type=oneshot
ExecStart=/usr/bin/lastlog2 --import /var/log/lastlog
ExecStartPost=/usr/bin/mv /var/log/lastlog /var/log/lastlog.migrated
RemainAfterExit=true

[Install]
WantedBy=default.target