Headless OpenCv

I am trying to download opencv and albumentations. I followed the steps in this link: Imgaug on Jetson Nano

However this does not. I downgraded pip to version 19, changed setup.py, and it continues to return errors.
I also tried to the same process with pip version 20, and it returns even more errors.

I have one jetson nano

Duplicated with Installing OpenCv Headless