diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index 90b4168ff21..6b43f6ed25c 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -43,7 +43,7 @@ qtModule {
 
   # QtWebKit overrides qmake's default_pre and default_post features,
   # so its custom qmake files must be found first at the front of QMAKEPATH.
-  preConfigure = ''
+  preConfigure = stdenv.lib.optionalString (!usingAnnulenWebkitFork) ''
     QMAKEPATH="$PWD/Tools/qmake''${QMAKEPATH:+:}$QMAKEPATH"
     fixQtBuiltinPaths . '*.pr?'
     # Fix hydra's "Log limit exceeded"