diff --git a/pkgs/development/libraries/qt-5/5.5/qttools.nix b/pkgs/development/libraries/qt-5/5.5/qttools.nix
index 65edc4508128..a6b29c07cac9 100644
--- a/pkgs/development/libraries/qt-5/5.5/qttools.nix
+++ b/pkgs/development/libraries/qt-5/5.5/qttools.nix
@@ -3,4 +3,11 @@
 qtSubmodule {
   name = "qttools";
   qtInputs = [ qtbase ];
+  postFixup = ''
+    fixQtModuleCMakeConfig "Designer"
+    fixQtModuleCMakeConfig "Help"
+    fixQtModuleCMakeConfig "LinguistTools"
+    fixQtModuleCMakeConfig "UiPlugin"
+    fixQtModuleCMakeConfig "UiTools"
+  '';
 }