Interesting that this is in a self-developed subset/dialect of Rust called Crust which attempts to treat it as a better C, using unsafe everywhere among other things.
I don't know why you'd see that as desirable and not use Zig. Unsafe Rust is actually harder to get right than C or Zig.
Tsoding's main lesson is how simple systems can be and the desire and demand for complex build systems is silly.