Since it runs against latest dependencies, it'll probably break again at some point. Wouldn't it be safer to keep preventing to build from source and do that even for the other optional deps instead ?

Yes, I managed to lure you with the "Quick review" label 😉 (or maybe it was pure coincidence ...)

Since it runs against latest dependencies, it'll probably break again at some point.

It only breaks if there is a release without wheels, do we expect that to happen often?

My plan going forward is to move towards lock files, see #22448, in other words for this particular build, dependencies will be pinned with the maximum version updated automatically in a PR (by hand first, automatically with Github Action eventually).

Yes, I managed to lure you with the "Quick review" label

Totally :D

dependencies will be pinned with the maximum version

for which there are available wheels ?

for which there are available wheels ?

I think this is doable with pip-compile, there is a --pip-args argument to pass additional arguments to pip so you could pass --only-binary to it.

For conda-lock I am not too sure you can have this logic in environment.yml somehow or pass it to poetry since poetry is used for the pip dependencies inside the environment.yml (edit: it does not seem that easy to do after googling).

This change is included in #22567 which will get merged almost surely. Should this one be closed ?

Indeed that was not part of my evil plan I promise ... closing this one then ...

I'll keep in mind your proposal of trying as much as possible to install wheels with pip if my lock files work #22448