def METHOD_NAME(self):
    # deal with inconsistent intermediate folders of tarballs
    # 02.00.00 only has 'R02-00-00'
    # but 02.02.00 has 'EvtGen/R02-02-00'
    if self.spec.satisfies("@02.02.00:"):
        return "R" + str(self.version).replace(".", "-")
    else:
        return ""