Fun side fact: that's a project from Yusuke Endoh, who also happens to be the most prolific winner of the the obfuscated C contest (ioccc.org).

This is the first project I've ever seen with an excuse to declare as many dependencies as it does.

There is an issue on Nixpkgs to package this absolute (but beautiful) monster of a package.[0]

[0] https://github.com/NixOS/nixpkgs/issues/131492