diff --git a/pkgs/development/libraries/kde-frameworks/kauth/default.nix b/pkgs/development/libraries/kde-frameworks/kauth/default.nix
index 05e562511a1f..93c81525a148 100644
--- a/pkgs/development/libraries/kde-frameworks/kauth/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kauth/default.nix
@@ -7,7 +7,7 @@
 mkDerivation {
   name = "kauth";
   nativeBuildInputs = [ extra-cmake-modules ];
-  buildInputs = [ qttools ] ++ lib.optional enablePolkit polkit-qt;
+  buildInputs = lib.optional enablePolkit polkit-qt ++ [ qttools ];
   propagatedBuildInputs = [ kcoreaddons ];
   patches = [
     ./cmake-install-paths.patch