How do you use emacs to develop inside guix containers. (tell me your story!)

How would you get your outside-guix-container-emacs to edit a inside-guix-container-file?

Or, tell me how these plans feel to you:

  1. Put Emacs in the container, then it can access the file.
  2. Keep Emacs out of the container, find a way to give Emacs access to the file.

The latter seems better given my need to just access the file, the former seems better if I want an Emacs container too.

I would appreciate any stories you have about this kind of thing! Great!