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I have run into multiple package problems with 3.13 with a non obvious root cause error message. Thankfully, uv makes it trivial to switch out to 3.12


I work on our error messages, feel free to open an issue and we'll do our best to make it clearer


Hey there, I experienced a hairy error message recently too while trying to install aider-chat from pypi with Python 3.13 and Pixi (but I was told the error was coming from UV).

"Solution": `pixi add python=3.12`, then `pixi add --pypi aider-chat` succeeds without issues.

A message like "aider-chat seems to be incompatible with python=3.13, try downgrading to python-3.12" would be great, assuming this is really the case.

I can create an issue if it helps, but really quick here's the error I was getting and some talk on discord about it:

https://pastebin.com/UVkFstJH

https://discord.com/channels/1082332781146800168/12957237931...


Thanks! There's definitely room for improvement there. I'll see what we can do — in general it's a bit of an arcane task to extract clear suggestions from the resolver's error tree.


Sounds good, thank you!




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