def _extract_mvapich(version_buffer_str):
    """
    Parses the typical MVAPICH library version message, eg:
    MVAPICH Version:  3.3b2
    MVAPICH Release date: Mon Apr  9 17:58:42 CDT 2018
    [...]
    """
    return version_buffer_str.split(":", 1)[1].split("M", 1)[0]