They are in Nixpkgs, presumably it would just be a matter of replacing coreutils in the stdenv[0] with uutils, then attempting to build, say, Firefox with the new stdenv.

[0] https://github.com/edolstra/nixpkgs/blob/master/pkgs/stdenv/...

There is a package for nix: https://gitlab.tryp.io/nix/nixpkgs/-/tree/bodhi/pkgs/tools/m... (but not up to date)

I went to check[0] who was the maintainer for uutils-coreutils on Nixpkgs, and realized it was me! Thanks for the reminder, will push a PR update.

[0] https://repology.org/project/uutils-coreutils/versions

Update has been pushed and merged, will show up in the binary caches within the next few days :)

Well that's a kind of forgetfulness I hadn't seen before =P

Now there's a PR up for Rust-based stdenv![0]

[0] https://github.com/NixOS/nixpkgs/pull/116274