diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix
index bfc2ee8f664c..90e842703417 100644
--- a/pkgs/top-level/stage.nix
+++ b/pkgs/top-level/stage.nix
@@ -54,8 +54,8 @@ in
 
   # `stdenv` without a C compiler. Passing in this helps avoid infinite
   # recursions, and may eventually replace passing in the full stdenv.
-  stdenvNoCC ? (
-    stdenv.override {
+  stdenvNoCC ? stdenv.override (
+    {
       cc = null;
       hasCC = false;
     }