Comment 1 for bug 1202942

the new checkbox providers are the guilty ones:

    @property
    def CHECKBOX_SHARE(self):
        """
        Return the required value of CHECKBOX_SHARE environment variable.

        .. note::
            This variable is only required by one script.
            It would be nice to remove this later on.
        """
        return self.jobs_dir

it should be self._base_dir instead