def METHOD_NAME(self):
    # Put more-specific prefixes first
    check_prefixes = [
        join_path(self.prefix, "share", "tcl{0}".format(self.version.up_to(2))),
        self.prefix,
    ]
    for prefix in check_prefixes:
        result = find(prefix, "init.tcl")
        if result:
            return os.path.dirname(sorted(result)[0])