* TODO Guix json dump all python packages in channel (CLI)

[jgart]

looking at this:

https://github.com/NixOS/nixos-search/blob/main/flake-info/src/commands/nixpkgs_info.rs#L14

i thought...

Wouldn't it be cool if you could do

```
guix dump -L my-guix-channel/ --json --filter=py
```

I know it's possible by writing Guix API code.


And I know it's possible to slap a srfi-37 on it and ship it. I'm just being 
lazy and posting to
guix-devel instead of taking the time to implement it.

* DONE