or-tools: ImportError: undefined symbol: _threadnumber

Hello, I’ve got python 3.8 as python3 in my system and python 3.7 virtual enviroment. I need to run or-tools in Jupyter notebook with kernel based on python 3.7 venv. What I did:

1. cloned repo
2. make third_party
3. set UNIX_PYTHON_VER = 3.7 and UNIX_SCIP_DIR = /usr/scipoptsuite-6.0.2 in Makefile.local
4. make python_package
5. activated venv, cd into wheel package dir (or-tools/temp_python3.7/ortools/)
6. pip install . Got “Successfully installed ortools-7.4.7384” answer

So ortools now into my venv/lib/python3.7/site-packages

But when I’ve tried to import pywraplp, I’ve got that error:

ImportError                               Traceback (most recent call last)
<ipython-input-1-9cb27b840291> in <module>
----> 1 from ortools.linear_solver import pywraplp
      2 import numpy as np
      3 import pandas as pd
      4 from get_cost import score

~/py37/lib/python3.7/site-packages/ortools/linear_solver/pywraplp.py in <module>
     11 # Import the low-level C/C++ module
     12 if __package__ or "." in __name__:
---> 13     from . import _pywraplp
     14 else:
     15     import _pywraplp

ImportError: /home/satellite/py37/lib/python3.7/site-packages/ortools/linear_solver/../../ortools/.libs/libortools.so: undefined symbol: _threadnumber

System: Manjaro Linux 5.4.2-1 Python: Python 3.7.5 Jupyter: jupyter core : 4.6.1 ipython : 7.10.1 ipykernel : 5.1.3 jupyter client : 5.3.4 Or-tools: ortools-7.4.7384