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

https://github.com/gogabr/void-packages ghc-build
https://github.com/void-linux/void-packages/pull/22426

Ghc build for aarch64, aarch64-musl
aarch64 binaries should probably be moved to a more appropriate place.

A patch file from https://github.com/void-linux/void-packages/pull/22426.patch is attached