VSCode rust-analyzer WARN cargo metadata failed

I’m new to developing on nix and I’m running into a problem with rust-analyzer. It previously complained about a lot of things, but I worked them out with this shell.nix file: with import <nixpkgs> { }; stdenv.mkDerivation { name = "rust-env"; nativeBuildInputs = [ # Build-time dependencies rustc cargo llvmPackages.clang glibc glibc.dev pkg-config libclang ffmpeg ]; buildInputs = [ # Run-time dependencies ffmpeg ]; # Environment varia...