How to use uutils-coreutils instead of the builtin coreutils?

Malix · July 9, 2026, 11:31am

I just crafted the dynamic alternative:

gist.github.com

https://gist.github.com/Malix-Labs/d4157e47f0f7175242cf717b936af5e3

README.md

# Nix Lib Coreutils

Nix Library for Coreutils

## Setup

### Flakes

```nix
inputs.lib-coreutils = {

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default.nix

{ lib }:
{
  replaceGnuCoreutilsWithUutils = import ./replaceGnuCoreutilsWithUutils.nix;
  padName = import ./padName.nix lib;
}

flake.lock

{
  "nodes": {
    "nixpkgs-lib": {
      "locked": {
        "lastModified": 1783217952,
        "narHash": "sha256-lItVCcSNUiL9NlB0+VoZwhtZk+0jAnfjJjch1g7U0bM=",
        "owner": "nix-community",
        "repo": "nixpkgs.lib",
        "rev": "830143f1e74a5ce8aa6cdad9c41ae84b73e8b3be",
        "type": "github"

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I haven’t focused on performance yet

Let me know if anyone can find something better

I think a solution like this is close to what’s the best alternative possible without a dedicated NixOS option to chose which coreutils (and such) to use

Until then, we will always be bottlenecked by replaceDependencies