{
  lib,
  pkgs,
  ...
}: let
  # get the last working revision with nvidia 410.x
  nixos-unstable-pinned =
    import (pkgs.fetchFromGitHub {
      owner = "NixOS";
      repo = "nixpkgs";
      rev = "d680ded26da5cf104dd2735a51e88d2d8f487b4d";
      sha256 = "sha256-fkJGNjEmTPvqBs215EQU4r9ivecV5Qge5cF/QDLVn3U=";
    }) {
      system = "x86_64-linux";
      config.allowUnfree = true;
    };

  # We'll use this twice
  pinnedKernelPackages = nixos-unstable-pinned.linuxPackages_latest;
in {
  nixpkgs.config.packageOverrides = pkgs: {
    # swap out all of the linux packages
    linuxPackages_latest = pinnedKernelPackages;
    oldLinuxPackages = pkgs.linuxPackages_latest;

    # make sure x11 will use the correct package as well
    nvidia_x11 = nixos-unstable-pinned.nvidia_x11;
  };

  # line up your kernel packages at boot
  boot.kernelPackages = pinnedKernelPackages;

  warnings =
    lib.optional (pkgs.oldLinuxPackages.nvidia_x11.version != "545.29.02")
    "New nvidia drivers (${pkgs.oldLinuxPackages.nvidia_x11.version}) available, does this fix the backlight issues on the thinkpad?";
}