Arch Linux build issue

I am taking over the Arch Linux AUR package for ImplicitCAD, and I am noticing that as of #462, ImplicitCAD no longer distributes a `Setup.hs` file. This file is used by the [boilerplate `PKGBUILD` script](https://wiki.archlinux.org/title/Haskell_package_guidelines#PKGBUILD_library_example) to generate `register.sh` and `unregister.sh` scripts that Arch Linux seems to require for their style of distribution. It seems that the option to generate an `unregister.sh` script is not available via a "v1" cabal command (e.g. like `cabal v1-unregister`), so I am looking for guidance on the best way to generate this `unregister.sh` script.

I am not very experienced in production packaging of Haskell projects, so I am likely missing something simple about the "Nix-style" packaging method that it appears ImplicitCAD now uses. Help! :)