Maybe this https://github.com/oakes/SolidOak/archive/0.1.3.tar.gz is build-able?
The instructions on GitHub for building this, are a little weirdly written (since it says that are build instructions for NeoVim.
This has sat in accepted for inclusion for over a year now. Clearly, there is a lack of demand for the inclusion of this software, nobody has stepped up to provide a patch, maintain it, and properly integrate it. Closing as a result. Feel free to reopen but only when someone offers a patch via our proper patch submission methods and volunteers to be maintainer.