{ config, lib, outputs, pkgs, ... }: {
  nixpkgs = {
    # You can add overlays here
    overlays = [
      # Add overlays your own flake exports (from overlays and pkgs dir):
      outputs.overlays.additions
      outputs.overlays.modifications
      outputs.overlays.stable-packages

      # You can also add overlays exported from other flakes:
      # neovim-nightly-overlay.overlays.default

      # Or define it inline, for example:
      # (final: prev: {
      #   hi = final.hello.overrideAttrs (oldAttrs: {
      #     patches = [ ./change-hello-to-hi.patch ];
      #   });
      # })
    ];
    # Configure your nixpkgs instance
    config = {
      # Disable if you don't want unfree packages
      allowUnfree = true;
      # Workaround for https://github.com/nix-community/home-manager/issues/2942
      allowUnfreePredicate = _: true;
    };
  };

  nix = {
    package = lib.mkDefault pkgs.nix;
    settings = {
      experimental-features = [ "nix-command" "flakes" "repl-flake" ];
      warn-dirty = false;
    };
  };
}