[nicce]

It took me few days to get some old Jupyter Notebooks working. I had to find the correct older version of Jupyter, correct version of the every plugin/extension that notebook used and then I had to find the correct version of every dependency of these extensions. Only way to get it working was a bunch of pinned dependencies.

[zelphirkalt]

Had they been properly pinned before, you would not have had to work for a few days. Code in a Jupyter notebook is unlikely to be relied upon elsewhere. Perfectly good for making it always use the exact same versions (checked by checksums, whatever tool you are using).