"prefix" is breaking if library overwrites jupyter settings in prefix

[Lundez]

Checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

❯ pixi init
❯ pixi add python solara
  × Is a directory (os error 21)

Issue description

This code installs solara. Solara sets a default value for Jupyter to enable server rendering, this is done under prefix/etc/jupyter/....

pixi sets prefix as a file with text, pointing to the .pixi folder.
I believe, as solara is installable using micromamba, that pixi does this in an incorrect way.

Expected behavior

Installation to work correctly.

[ruben-arts]

Looking in to this!

[ruben-arts]

It would be an easy fix to rename the prefix file to something else, but I think that in this case it shows that solara has an issue. As the prefix in prefix/etc/jupyter/.. seems to actually be referring to etc/jupyter "in" the "prefix" which isn't called prefix but .pixi/envs/default in this example.

We actually have the correct location for the Jupyter related files in .pixi/envs/default/etc/jupyter

Fun note

This is why `prefix.dev` is called prefix because we install in prefixes.

[wolfv]

We should move the prefix file to conda-meta/prefix instead, to avoid clobbering any packages.

[Lundez]

I'll make a separate request for solara to fix their thing 😊👍

But it seems based on final comment there's something for you to fix too, feel free to close ticket if not!

[maartenbreddels]

Looking at widgetti/solara@6ad9bae I think i did something wrong with refactoring from flit to hatchling.
@iisakkirotko fixed this by adding the line in widgetti/solara@080894e but we should have removed the weird "prefix" = "prefix line. Too bad, I guess you people liked that line a lot 🤣

[ruben-arts]

I guess you people liked that line a lot 🤣

It's a good line ;) , I chuckled that this specific line so horribly broke the pixi install

[iisakkirotko]

Hey everyone!

As @maartenbreddels said, I think removing the "prefix" = "prefix"-line should fix the issue, although I don't think I can verify this, since it seems like pixi doesn't support installing from path/github yet. Do let me know if there is a way to do this. Interesting name collision indeed :)

[ruben-arts]

No worries we'll fix this story on the pixi side in #959.

If you really want to test it you can create a package from the solara feedstock with the local source code you have. If the paths.json file still contains the prefix/etc/jupyter path it is not fixed.

[iisakkirotko]

I just checked, and the install works with Solara 1.29.1