Missing prelude in rust-analyzer when using `build-std` in workspace

[eivindbergem]

rust-analyzer version: rust-analyzer 1.84.0-nightly (e7c0d27 2024-10-15)
rustc version: rustc 1.84.0-nightly (e7c0d27 2024-10-15)
editor or extension: Emacs
code snippet to reproduce: full example

See linked repo for minimal example to reproduce.

When opening lib/src/lib.rs in editor, rust-analyzer gives errors saying that Option and other parts of Rust prelude is not in scope. The crate builds without errors using cargo build.