Return the current PATH, fixed to remove the docker tox env.

        :return: sanitized path
        :rtype: str

def _fixed_path(self, projdir):
        """
        Return the current PATH, fixed to remove the docker tox env.

        :return: sanitized path
        :rtype: str
        """
        res = []
        toxdir = os.path.join(projdir, '.tox')
        for p in os.environ['PATH'].split(':'):
            if not p.startswith(toxdir):
                res.append(p)
        return ':'.join(res)