> I mean, Haskell has like what, 2, 3, 4? Major build systems and package repositories? It's a quagmire.

Don't know when was the last time you've used Haskell, but the ecosystem is mainly focused on Cabal as the build tool and Hackage as the official package repository. If you've used Rust:

- rustup -> ghcup - cargo -> cabal - crates.io -> hackage - rustc -> ghc

It's admittedly been years.

ghcup didn't exist, AFAIK. Cabal was around but I think there was a different ecosystem that was more popular at the time (Started with an S, scaffold? Scratch? I can't find it).