[Unit]
Description=Штурман save last-known-time (fake-hwclock → /data, B07)
After=data.mount
Requires=data.mount

[Service]
Type=oneshot
# FILE из /etc/default/fake-hwclock (→ /data; v0.6). Сервис fake-hwclock в Lima masked → зовём напрямую с env.
ExecStart=/bin/sh -c '. /etc/default/fake-hwclock 2>/dev/null; FILE="${FILE:-/data/state/fake-hwclock.data}" fake-hwclock save'