{
  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
  # as well as the libraries available from your flake's inputs.
  lib,
  # An instance of `pkgs` with your overlays and packages applied is also available.
  pkgs,
  # You also have access to your flake's inputs.
  inputs,

  # Additional metadata is provided by Snowfall Lib.
  system, # The system architecture for this host (eg. `x86_64-linux`).
  target, # The Snowfall Lib target for this system (eg. `x86_64-iso`).
  format, # A normalized name for the system target (eg. `iso`).
  virtual, # A boolean to determine whether this system is a virtual target using nixos-generators.
  systems, # An attribute map of your defined hosts.

  # All other arguments come from the module system.
  config,
  ...
}:

with lib;

let
  cfg = config.modules.topgrade;
in
{
  options.modules.topgrade = {
    enable = mkOption { default = false; };
  };

  config = mkIf cfg.enable {
    programs.topgrade = {
      enable = true;
      settings = {
        misc.no_self_update = true;
        misc.pre_sudo = true; # Cache sudo password for 5 more minutes
        misc.assume_yes = true;
        misc.no_retry = true;

        linux.nix_arguments = "--flake /home/julian/.dotfiles";
        linux.home_manager_arguments = [
          "--flake"
          "/home/julian/.dotfiles"
        ];

        git = {
          # Additional git repositories to pull
          repos = [
            "~/.dotfiles"
            "~/dev/*"
          ] ++ lib.optional config.modules.emacs.enable "~/.config/doom";
        };
      };
    };
  };
}
