Cython needs to be installed in Python as a module

[GoulongWang]

I tried to install mirage on Ubuntu 18.04.6 LTS (Linux Kernel Version 5.4.0-126-generic)
When I typed sudo python3 setup.py install, it showed the following error.

It seemed something wrong with the numpy.distutils, so I checked the version of Python, setuptools and Cython on my environment.
Python version : 3.8.0
setuptools version : 39.0.1
Cython version : 0.29.32

Also, I read the document of numpy.distutils to find any hint about this error, but still didn't know how to fix it.
Could you give me some advice on this error?

Thanks