{
  user ? throw "user argument is required",
}:
{
  config,
  lib,
  pkgs,
  ...
}:
let
  hmConfig = config.home-manager.users.${user.name};
in
{
  home-manager.users.${user.name} = {
    programs = {
      btop.settings.color_theme = "matugen";

      matugen.settings.templates.btop = {
        input_path = ./theme.theme;
        output_path = "${hmConfig.xdg.configHome}/btop/themes/matugen.theme";
      };
    };

    theme.extraConfig = "${
      lib.meta.getExe (
        pkgs.writeShellApplication {
          name = "reload-btop";
          runtimeInputs = with pkgs; [ procps ];
          text = "exec pkill btop -SIGUSR2";
        }
      )
    } &";
  };
}