Nix Derivation Madness

> nix/store/24v9wpp393ib1gllip7ic13aycbi704g-ruby-3.3.9.drv

A different type of madness, but are ugly names so common, why not start with ruby-3.3.9 so any list of files is semantically sorted/readable?

I can't find the video of the talk where either Eelco Dolstra (nix) or Todd Gamblin (spack) talks about this, but IIRC it's a design decision; you generally don't go spelunking in the nix store, but if you do, and you ls /nix/store, you'll see a huge list of packages, and due to the hash being a constant length, you can visually separate the tails of the package names like

    0009flr197p89fz2vg032g556014z7v1-libass-0.17.3.drv
    000ghm78048kh2prsfzkf93xm3803m0r-default.md
    001f6fysrshkq7gaki4lv8qkl38vjr6a-python-runtime-deps-check-hook.sh.drv
    001gp43bjqzx60cg345n2slzg7131za8-nix-nss-open-files.patch
    001im7qm8achbyh0ywil6hif6rqf284z-bootstrap-stage0-binutils-wrapper-boot.drv
    001pc0cpvpqix4hy9z296qnp0yj00f4n-zbmath-review-template.r59693.tar.xz.drv

Spack, another deterministic builder / package manager, IIRC uses the reversed order so the hash is at the tail. Pros/cons under different search / inspection conditions.