There is an updated pull request by dkwo against master on the void-packages repository

https://github.com/dkwo/void-packages kbd
https://github.com/void-linux/void-packages/pull/29512

kbd: update to 2.4.0
I built and used it on my `x86_64-musl`.
Incidentally, the update fixes #29478 

A patch file from https://github.com/void-linux/void-packages/pull/29512.patch is attached