diff --git a/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix b/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
index 783d83bf9606..ab93966c0ac9 100644
--- a/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
@@ -9,7 +9,7 @@ mkDerivation {
   name = "kwindowsystem";
   meta = {
     maintainers = [ lib.maintainers.ttuegel ];
-    broken = builtins.compareVersions qtbase.version "5.7.0" < 0;
+    broken = lib.versionOlder qtbase.version "5.7.0";
   };
   nativeBuildInputs = [ extra-cmake-modules ];
   buildInputs = [ libpthreadstubs libXdmcp qttools qtx11extras ];