code: def _fixed_path(self, projdir):
          
          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)
docs: Return the current PATH, fixed to remove the docker tox env.
  
          :return: sanitized path
          :rtype: str