{
  pkgs ? import <nixpkgs> { },
}:

let
  unstable = import (fetchTarball "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz") { };
in
pkgs.mkShell {
  packages = with pkgs; [
    python312
    unstable.uv
    gh
    graphviz
  ];

  shellHook = ''
    if [[ -d .venv/ ]]; then
      source .venv/bin/activate
    fi
  '';
}