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

https://github.com/Piraty/void-packages rpi-kernel-fix-dkms
https://github.com/void-linux/void-packages/pull/14823

[WIP] rpi-kernel: enable build of kernel modules


A patch file from https://github.com/void-linux/void-packages/pull/14823.patch is attached