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

https://github.com/non-Jedi/void-packages fennel
https://github.com/void-linux/void-packages/pull/23680

New package: fennel-0.4.2
This can actually run on any of the lua alternatives, but I'm not sure if it's possible to specify that as a dependency, so I picked the latest lua release.

A patch file from https://github.com/void-linux/void-packages/pull/23680.patch is attached