wifi_cfg: imgmount root_copy
printf '%s\n' "$$WIFI_CFG" >"$</etc/network/interfaces.d/wifi"
chmod 644 "$</etc/network/interfaces.d/wifi"
- chroot "$<" systemctl mask systemd-networkd-wait-online.service
busybox: imgmount root_copy
mkdir -p -m 755 "$</opt/busybox"