# nix-overlay Nix-Overlay, a combo of my gitlab repo and tdeo's repo while updated - OpenTabletDriver add ```nix { config, lib, pkgs, ... }: let rev-overlay = "master"; url-overlay = "https://github.com/cidkidnix/nix-overlay/archive/${rev-overlay}.tar.gz"; nix-overlay-modules = builtins.fetchTarball url-overlay; nix-overlay = (import (builtins.fetchTarball url-overlay)); in ``` to the top of your configuration.nix then add ```nix { imports = [ ... "${nix-overlay-modules}/opentabletdriver.nix" ]; nixpkgs.overlays = [ (nix-overlay) ]; environment.systemPackages = with pkgs; [ opentabletdriver ]; } ```