Rust : Thanks to 3Jl0y_PYCCKUi I now have a proper Rust shell config.

.config/linux/shell/Rust.nix

@@ -1,13 +1,11 @@
-with import <nixpkgs> {};
-
-mkShell {
-	NIX_LD_LIBRARY_PATH = lib.makeLibraryPath [
-		stdenv.cc.cc
-	];
-	NIX_LD = lib.fileContents "${stdenv.cc}/nix-support/dynamic-linker";
-
-	buildInputs = [
+let
+	pkgs = import <nixpkgs> {};
+	lib = pkgs.lib;
+in
+pkgs.mkShell {
+	nativeBuildInputs = with pkgs; [
 		cargo
 		rustc
+		rust-analyzer
 	];
 }