diff --git a/pkgs/development/libraries/qt-6/modules/qtwebengine/default.nix b/pkgs/development/libraries/qt-6/modules/qtwebengine/default.nix
index 710c53091de14..192f1138c0a68 100644
--- a/pkgs/development/libraries/qt-6/modules/qtwebengine/default.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtwebengine/default.nix
@@ -153,8 +153,8 @@ qtModule {
         src/3rdparty/chromium/gpu/config/gpu_info_collector_linux.cc
     ''
     + lib.optionalString stdenv.hostPlatform.isDarwin ''
-      substituteInPlace cmake/Functions.cmake \
-        --replace "/usr/bin/xcrun" "${xcbuild}/bin/xcrun"
+      substituteInPlace cmake/QtToolchainHelpers.cmake \
+        --replace-fail "/usr/bin/xcrun" "${xcbuild}/bin/xcrun"
     '';
 
   cmakeFlags =