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

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

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