I think this solves the rust-analyzer problem

[NireBryce]

Hey, I saw your post on mastodon and decided to investigate.

I got here from error message -> search for "rust standard library environment variable" -> find rust-lang/rust-analyzer#4172 -> search for "RUST_SRC_PATH" nixOS -> https://discourse.nixos.org/t/rust-src-not-found-and-other-misadventures-of-developing-rust-on-nixos/11570/5

which just requires plopping RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}"; in flake.nix, at least on my machine (nixOS, though, so I haven't tested other OSes)

I don't know much of the rust ecosystem on nix, and I'm fairly new to nix (via nixOS), but this seems to fix the rust analyzer issues for me.

I'm having other rust problems because nixOS, but if you could test this and see if it works it might be an easy fix -- it got rid of the error you were talking about.

[bluelinden]

Thank you so much for the investigation! I made my way to a band-aid fix that works on my machine like two hours ago, completely on accident. The solution was just to add:

[build]
rustflags = ["-C", "link-arg=-fuse-ld=lld"]

to backend/.cargo/config.toml. I think the problem may have been something to do with rustc linking to glibc in a weird way, and my patch solved the problem at least temporarily. I'll look into your fix as well. Thank you for the effort, and have a good day!

[bluelinden]

it turns out that the problem was in BuildFHSEnv anyway - closing this now as i ended up figuring it out for real.