nil/modules/system/homemanager.nix

{ config, home-manager, lib, pkgs, user, ... }: {
  imports = [ home-manager.nixosModules.home-manager ];
  home-manager = {
    useGlobalPkgs = true;
    useUserPackages = true;
    users."${user.name}" = {
      # You can update Home Manager without changing this value. See
      # the Home Manager release notes for a list of state version
      # changes in each release.
      home.stateVersion = "21.11";

      # Let Home Manager install and manage itself.
      programs.home-manager.enable = true;
    };
  };
}