WOW! THANKS!!!
I knew it had to be something small.
I was also expecting more libraries to be needed.
This is awesome!
My first Nix shell . . . I have been struggling a few days.
A few people were insisting that I give up and leave Nix behind.
Or . . . try different approaches, like SergeK’s response in Why is it so hard to use a Python package?.
Now, I almost understand most of what this shell is doing.
Your explanation is great, I am going to be rereading it many times!
That test suggestion is awesome too!
Thanks so much!!!