Thanks for the PR @thomasjpfan

Those dependencies are automatically installed by pip if they were missing when building scikit-learn from source.

This line still exists and it's incorrect since numpy and scipy aren't installed automatically

Also, do you think it would be possible to have a check that makes sure our instructions are always correct? We seem to break them fairly often and it becomes a significant issue for contributing (see #20212 (comment) and the follow-ups)

Also, do you think it would be possible to have a check that makes sure our instructions are always correct? We seem to break them fairly often and it becomes a significant issue for contributing (see #20212 (comment) and the follow-ups)

It is possible. We can use literalinclude to include sections of a build script on the CI. Specifically, start-after and end-before options allow us to choose sections of the build script to include in the install docs.