Based on an Arch Linux package
You can download the .deb package from here or you can package it manually.
run dpkg-deb --build systemd-iptables1.1-0 to build a .deb package
sudo dpkg -i systemd-iptables1.1-0.deb
sudo dpkg -r systemd-iptables
NOTE: Iptables rules should be saved to /etc/iptables/iptables.rules or /etc/iptables/ip6tables.rules