diff --git a/pkgs/development/libraries/qt-5/mkDerivation.nix b/pkgs/development/libraries/qt-5/mkDerivation.nix
index ba66dc89ede..98f9a05fac7 100644
--- a/pkgs/development/libraries/qt-5/mkDerivation.nix
+++ b/pkgs/development/libraries/qt-5/mkDerivation.nix
@@ -9,8 +9,6 @@ args:
 let
   args_ = {
 
-    enableParallelBuilding = args.enableParallelBuilding or true;
-
     nativeBuildInputs = (args.nativeBuildInputs or []) ++ [ wrapQtAppsHook ];
 
   };