[Unit]
ConditionPathExists=/run/resolvconf/enable-updates
ConditionFileIsExecutable=/sbin/resolvconf
After=systemd-resolved.service

[Service]
Type=oneshot
ExecStart=+-/bin/sh -c 'cat /run/systemd/resolve/stub-resolv.conf | grep -v edns0 | /sbin/resolvconf -a systemd-resolved'

[Install]
WantedBy=systemd-resolved.service