[arch-general] rc.local.shutdown equivalent in systemd

Hello, I've decided to try systemd and see for myself. Anyway, I need to remove a module before shutdown, which rc.local.shutdown did nicely for me. I know there is an initscripts-systemd packages that would allow me to keep using rc.local.shutdown, but the wiki discourages its use and recommends instead using systemd native configuration files. Hence my question: what's the systemd native way to do stuff (in my case, remove a module) before shutdown? Thanks, Manolo --