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

https://github.com/newbluemoon/void-packages lilypond
https://github.com/void-linux/void-packages/pull/26958

lilypond: update to 2.21.81
Tested on x86_64-musl.

A patch file from https://github.com/void-linux/void-packages/pull/26958.patch is attached