archlive-zfs/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf

# Allow systemd-networkd-wait-online to succeed with one interface, otherwise, if multiple network interfaces exist,
# network-online.target gets needlessly delayed.
# See https://wiki.archlinux.org/title/systemd-networkd#systemd-networkd-wait-online
[Service]
ExecStart=
ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any