There is a new pull request by st3r4g against master on the void-packages repository

https://github.com/st3r4g/void-packages rtkit-deps
https://github.com/void-linux/void-packages/pull/28736

rtkit: requires dbus and polkit
See end of https://github.com/heftig/rtkit/blob/master/README

It doesn't work without them.

A patch file from https://github.com/void-linux/void-packages/pull/28736.patch is attached