{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    systems.url = "github:nix-systems/default";
    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
    treefmt-nix.url = "github:numtide/treefmt-nix";
  };

  outputs =
    inputs@{ flake-parts, systems, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = import systems;
      imports = [
        ./nix/devShells.nix
        ./nix/treefmt.nix
      ];

      perSystem =
        { system, ... }:
        {
          _module.args.pkgs = import inputs.nixpkgs {
            inherit system;
            overlays = [
              (final: prev: {
                nodejs = prev.nodejs_20; # v20.19.5
              })
            ];
            config = { };
          };
        };
    };
}