nix develop fails on example python-local-development (source location of dependency does not exist)

[akaihola]

I get the following error when running nix develop on current main in the examples/packages/languages/python-local-development/ directory:

[~/dream2nix/examples/packages/languages/python-local-development]$ nix develop
Error: The python dependency charset-normalizer of mytool is configured to be installed in editable mode,
but the provided source location
/home/akaihola/dream2nix/examples/packages/languages/python-local-development/.editables/charset_normalizer
does not exist.
Please provide a path to a local copy of the source code of charset-normalizer.

I can't find documentation on how I'm supposed to manage editable dependencies. Do I need to download the source distribution for each of the editable dependencies (just charset-normalizer in this case) and extract them into ./.editables/? Or is there some tooling to manage this? It would be helpful if this was pointed out in the documentation and in the error message.

[purepani]

Do I need to download the source distribution for each of the editable dependencies (just charset-normalizer in this case) and extract them into ./.editables/?

Yeah this is how it works atm. The editables module is pretty new so there's probably still some work/tooling that can make it a bit smoother.
That said, i'm not quite sure why we don't have the charset-normalizer package in the example repo itself so that it works out of the box. That is something we can add(assuming it makes sense).