Hi Danny!

> 
> ... why?
> 
> I've checked the source code of poezio and it does not use aiodns, aiohttp.
> 
> In order to find that out:
> 
> $ guix build python-aiodns
> 
> Check resulting directory to find 
> /gnu/store/8bzk4dwhhbblz8gky9hzdnzjlsi1nk7v-python-aiodns-1.1.1/lib/python3.8/site-packages/aiodns/__init__.py
> 
> That means a user of the library would have to do 
> 
>   from aiodns import *
> 
> or
> 
>   import aiodns
> .
> 
> So I grepped the whole source code of poezio, and it doesn't do that.  Hence
> it is not a direct input.
> 
> It is a propagated-input in a dependency, which indeed does do the import.
> 
> You can't really trust what upstream says here.  Almost no package manager
> has non-propagated inputs, so of course they wouldn't be saying "the input
> such and such is propagated, and the input such and such is not propagated".
> 
> Thus you have to check it yourself.
> 
> Could you do so with the other dependencies before adding them?

Hmm. When I grep the source, they were mentioned in requirements.txt and
requirements-plugins.txt. Also, the setup.py has install_requires and
plugins_require sections, which are similar to required section in .pc
files right?

Regards,
RG.