def METHOD_NAME(extra_vars=None):
    """Define custom easyconfig parameters specific to ParaStationMPI."""
    extra_vars = EB_MPICH.METHOD_NAME(extra_vars)
    # ParaStationMPI doesn't offer this build option, and forcing it in the MPICH build
    # can be potentially conflictive with other options set by psmpi configure script.
    del extra_vars['debug']
    extra_vars.update({
        'mpich_opts': [None, "Optional options to configure MPICH", CUSTOM],
        'threaded': [False, "Enable multithreaded build (which is slower)", CUSTOM],
        'pscom_allin_path': [None, "Enable pscom integration by giving its source path", CUSTOM],
    })
    return extra_vars