{inputs, ...}: {
  # This one brings our custom packages from the 'pkgs' directory
  additions = final: prev:
    (import ../pkgs {pkgs = final;})
    // {
      crush = inputs.nix-ai-tools.packages.${prev.system}.crush;
    };

  # This one contains whatever you want to overlay
  # You can change versions, add patches, set compilation flags, anything really.
  # https://nixos.wiki/wiki/Overlays
  modifications = final: prev: {
    n8n = import ./mods/n8n.nix {inherit prev;};

    # example = prev.example.overrideAttrs (oldAttrs: rec {
    # ...
    # });
  };

  stable-packages = final: _prev: {
    stable = import inputs.nixpkgs {
      system = final.system;
      config.allowUnfree = true;
    };
  };
  unstable-packages = final: _prev: {
    unstable = import inputs.nixpkgs-unstable {
      system = final.system;
      config.allowUnfree = true;
    };
  };
}