{
  username ? throw "username argument is required",
}:
{ ... }:
{
  home-manager.users.${username}.programs.btop = {
    enable = true;
    settings = {
      theme_background = false;
      presets = "";
      vim_keys = true;
      shown_boxes = "cpu mem net proc gpu0 gpu1";
      update_ms = 1000;
      proc_tree = true;
      cpu_single_graph = true;
      disks_filter = "/ /nix /persist /cache";
    };
  };
}