You need Haxe 3.4.2+ installed.
The static site generator source depends on hxtemplo and haxe-markdown (funkin crew fork!).
Install the libraries using haxelib, run the following command in the root of the project:
haxelib install all
The CSS files are compressed using less. Install from npm:
npm install
Run haxe build.hxml.
The main repo tells users to run it through neko, so we do that as well. But we also run highlighting.hxml for the code highlighting.
For highlighting you'll need the submodules in grammars/ (XML and JSON have some git errors, so just manually download them.)