diff --git a/pkgs/development/libraries/qt-5/5.5/default.nix b/pkgs/development/libraries/qt-5/5.5/default.nix
index 88f064edc7d..955d57350c2 100644
--- a/pkgs/development/libraries/qt-5/5.5/default.nix
+++ b/pkgs/development/libraries/qt-5/5.5/default.nix
@@ -50,7 +50,7 @@ let
       configureScript = args.configureScript or "qmake";
 
       outputs = args.outputs or [ "dev" "out" ];
-      setOutputFlags = false;
+      setOutputFlags = args.setOutputFlags or false;
 
       enableParallelBuilding = args.enableParallelBuilding or true;