virtualbox-guest-modules-virt (no such package)

I'm running the Alpine virtual image in VirtualBox. It installs fine and everything works, until I get to installing guest additions. I do what the wiki says; I enable community packages, run apk update, then apk add virtualbox-guest-additions virtualbox-guest-modules-virt, but it always returns this: ERROR: unable to select packages: virtualbox-guest-modules-virt (no such package): required by: world[virtualbox-guest-modules-virt]

I've tried rebooting, reinstalling Alpine, retyping the command and checking for typos, and different mirrors, and I've checked the .iso checksum and made sure I've added community packages and updated.

I've looked at some of the mirrors, and I can't find the virtualbox-guest-modules-virt package in main or community. Am I missing something obvious?