Failed to find function dmlab_connect in library! RuntimeError: Failed to connect RL API

hi,I used Git to clone episodic-curiosity and DeepMind Lablocally as required and tested DMlab with bazel run :python_random_agent command, but there is no problem and it can run.
But when I apply our patch to DeepMind Lab:

git checkout 7b851dcbf6171fa184bf8a25bf2c87fe6d3f5380
git checkout -b modified_dmlab
git apply ../third_party/dmlab/dmlab_min_goal_distance.patch
Error Failed to find function dmlab_connect in library! RuntimeError: Failed to connect RL API occurs when I run command bazel run :python_random_agent again.
I have checked that the [runfile directory is wrong](https://github.com/deepmind/lab/issues/209) but I don't know how to set it.
[Deepmind Lab. set Runfiles path(path)](https://github.com/deepmind/lab/blob/master/docs/users/python_api.md) is also mentioned in the Python API
My configuration environment：
Ubuntu 16.04
Anaconda3
python3.6
I hope you can help me because it means a lot to me