Is there any tutorial how to develop on nixos-render-docs?
https://github.com/NixOS/nixpkgs/tree/528a4bb0ac5e5af73445472ec25945460add7768/doc#contributing-to-this-documentation
The only sentence there is:

The rendering tool is nixos-render-docs, sometimes abbreviated nrd.

I am not super familiar with the implied workflow python development on that package.

I'm Calling nix develop .#nixos-render-docs to load the build dependencies of the package in my shell.
But then executing pytest

Results in an error

ImportError while importing test module 'nixos-render-docs/src/tests/test_asciidoc.py'.
....
    import nixos_render_docs as nrd
E   ModuleNotFoundError: No module named 'nixos_render_docs'