[BUG] Installation error on NixOS

Describe the bug 🐛
When trying to install on NixOS via Home Manager, an error occurs due to the use of different versions of Python

To Reproduce 🐣
Steps to reproduce the behavior:

1. Add this to your inputs in flake.nix:

dooit.url = "github:dooit-org/dooit";
dooit-extras.url = "github:dooit-org/dooit-extras";

And add this to your home.nix:

imports = [
  inputs.dooit.homeManagerModules.default
];
nixpkgs.overlays = [ inputs.dooit-extras.overlay ];
programs.dooit = {
  enable = true;
  extraPackages = [ pkgs.dooit-extras ];
};

3. Rebuild the Home Manager using the home-manager switch command
4. See error

Expected behavior 🤔
Ready-to-use dooit and dooit-extras packages

Screenshots 🧐

Desktop (please complete the following information): 🤖

• OS: Linux NixOS
• Version 25.05 (Warbler)

Additional context 📝
Nothing

[brysenPfingsten]

The fix for me was to instead of

    dooit.url = "github:dooit-org/dooit";
    dooit-extras.url = "github:dooit-org/dooit-extras";

as described, do something like

    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    dooit = {
      url = "github:dooit-org/dooit";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    dooit-extras = {
      url = "github:dooit-org/dooit-extras";
      inputs.nixpkgs.follows = "nixpkgs";
    };

This ensure they are pulling the same python package.

That should get the build going but the tests will fail. I submitted PR #247 trying to fix this.

[kraanzu]

Yes maintaining 2 separate packages is a hassle. I'd eventually get rid of extras
It was not a good idea lol

[Mouadhbendjedidi]

NixOS module broken on recent nixpkgs (March 2026)
Getting two separate errors depending on config approach:

With Home Manager module: sphinx-9.1.0 not supported for interpreter python3.11 — dooit's dependencies pull sphinx via python3.11 which is no longer supported in recent nixpkgs
With NixOS module: path '.../modules/core/dooit.nix' does not exist — the flake references a file that doesn't exist in the store

Both approaches are broken on nixpkgs as of March 2026. The fix would be upgrading to python3.12 as the default interpreter.
nixpkgs rev: 80bdc1e5ce51f56b19791b52b2901187931f5353