python – Conda: what shall be the content of build.sh in 2023?

I found grayskull for creating meta.yml files and I found this github action for publishing on conda.

However, said github action require a build.sh file and according to the official guide such a file must contain “…the text exactly as shown:”

$PYTHON setup.py install     # Python command to install the script.

Nevertheless, newest project have pyproject.toml and I am not sure the above guide applies today since it is from 2018, apparently.

As it is today, May 2023, what shall be the content of said build.sh?