I think the implementation is done but opening this as a draft to test if this works without any problem by myself.
Yeah, we need to implement more sophisticated test infra for cargo and flycheck things 😅

on that note, do we use the lockfile stuff for flycheck? 🤔 (if not we should probably look into doing that)

on that note, do we use the lockfile stuff for flycheck? 🤔 (if not we should probably look into doing that)

No, I just realized that we are not doing it yet 😮

I've just tested this and realized that we need -Zlockfile-path 😅

Merging based on approvals 😄

I've got new one with --lockfile-path:

Failed to read Cargo metadata with dependencies for `/Users/_/project/Cargo.toml`: `cargo metadata` exited with an error: error: unexpected argument '--lockfile-path' found

• rust-analyzer 1.95.0-nightly (3a70d034 2026-02-27)
• rustc 1.95.0-nightly (3a70d0349 2026-02-27)

Originally posted in #21510