[arch-releng] worker_mkinitcpio missing?

It looks like in the latest aif the worker_mkinitcpio function is missing. I am using this function in Varch to prepare the initcpio for certain virtualized hardware, so I am just asking, what function should I overwrite in the aif config file instead to ensure that the mkinitcpio.conf is overwritten before the initcpio is generated? Thanks -Thomas S Hatch