There is an updated 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/36394

lilypond: update to 2.23.8
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#### Testing the changes
- I tested the changes in this PR: **YES**

Finally getting rid of guile1.8! :)

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#### Local build testing
- I built this PR locally for my native architecture, (x86_64, x86_64-musl, i686)
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  - armv7l-musl



A patch file from https://github.com/void-linux/void-packages/pull/36394.patch is attached