There is a new pull request by gcat432 against master on the void-packages repository

https://github.com/gcat432/void-packages crystal-0.34.0
https://github.com/void-linux/void-packages/pull/20762

crystal: update to 0.34.0.
- Compilation was locally tested with both i686 and x86_64
- Package was locally installed on x86_64, `crystal` and `shards` work
- `shards` now requires the `molinillo` Crystal library to works. As this library cannot be installed using `shards` as we are effectively building `shards`, I decided to download it the same way as `shards`, to create a dedicated directory in `wrksrc` for it, then use `mv` to move the interesting files into `shards/lib`. I do not really know whether it is the right way to do it, but it works. If there is a better way, please tell me and I will try to make it work.
- Issue with multi-threading: it is (still) not possible to compile programs with the `-Dpreview_mt` flag. See #14858

A patch file from https://github.com/void-linux/void-packages/pull/20762.patch is attached