--- a/js/src/moz.build
+++ b/js/src/moz.build
@@ -50,9 +50,12 @@
 if CONFIG["ENABLE_WASM_CRANELIFT"]:
     CONFIGURE_SUBST_FILES += ["rust/extra-bindgen-flags"]
 
+DIRS += [
+    "rust"
+]
+
 if not CONFIG["JS_DISABLE_SHELL"]:
     DIRS += [
-        "rust",
         "shell",
     ]