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

https://github.com/slotThe/void-packages ghc-8.8.3
https://github.com/void-linux/void-packages/pull/20365

[WIP] GHC 8.8.3
Roadmap:

- [X] ghc
- [ ] ghc-bin  --- All that's left is for someone to upload the musl tarball somewhere.
- [X] cabal-install
- [X] stack
- [x] Rebuild literally every single haskell package we have and see if anything's broken:
    - [x] git-mediate
    - [x] xmonad-contrib
    - [x] kmonad
    - [x] cgrep
    - [x] debug-me
    - [x] hlint
    - [x] hoogle
    - [x] xmonad
    - [x] darcs
    - [x] shellcheck
    - [x] git-annex
    - [x] hledger
    - [x] pandoc
    - [x] xmobar

  

A patch file from https://github.com/void-linux/void-packages/pull/20365.patch is attached