def install(package_name):
    """Installs a holodeck package.

    Args:
        package_name (str): The name of the package to install
    """
    holodeck_path = util.get_holodeck_path()
    binary_website = "https://s3.amazonaws.com/holodeckworlds/"

    if package_name not in packages:
        raise HolodeckException("Unknown package name " + package_name)
    package_url = packages[package_name]

    print("Installing " + package_name + " at " + holodeck_path)
    install_path = os.path.join(holodeck_path, "worlds")
    binary_url = binary_website + util.get_os_key() + "_" + package_url
    _download_binary(binary_url, install_path)
    if os.name == "posix":
        _make_binary_excecutable(package_name, install_path)
Installs a holodeck package.

    Args:
        package_name (str): The name of the package to install