ModuleNotFoundError: No module named 'DistUtilsExtra'

Python Help
1

On Ubuntu 20.04.3 LTS, I install pdfarranger according to the guidance here using the following steps:

$ git clone https://github.com/pdfarranger/pdfarranger.git
$ pyenv shell datasci
$ python --version
Python 3.9.1
$ cd pdfarranger
$ ./setup.py build
Traceback (most recent call last):
  File "/home/werner/Public/repo/github.com/pdfarranger/pdfarranger.git/./setup.py", line 24, in <module>
    from DistUtilsExtra.command import (
ModuleNotFoundError: No module named 'DistUtilsExtra'

Then I try the following but still failed:

$ pip install distutils-extra
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
ERROR: Could not find a version that satisfies the requirement distutils-extra (from versions: none)
ERROR: No matching distribution found for distutils-extra

Any hints for fixing this problem?

Regards,
HZ