{
  config,
  lib,
  pkgs,
  ...
}:
{
  options.my.shell.exercism.enable = lib.mkEnableOption "enable";
  config = lib.mkIf config.my.shell.exercism.enable {
    users.users.jawz.packages = with pkgs; [
      exercism # learn to code
      bats # testing system, required by Exercism
    ];
  };
}