diff --git a/shell.nix b/shell.nix
index fb36159..bae806c 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,7 +2,8 @@ with import <nixpkgs> { overlays = [ (import <rust-overlay>) ]; };
 mkShell {
   buildInputs = [
     (rust-bin.stable.latest.default.override {
-      extensions = [ "rust-src" "rustfmt-preview" ];
+      extensions =
+        [ "rust-src" "rustc-dev" "rustfmt-preview" "llvm-tools-preview" ];
       targets =
         pkgs.lib.optionals pkgs.stdenv.isDarwin [ "aarch64-apple-darwin" ]
         ++ pkgs.lib.optionals pkgs.stdenv.isLinux