diff --git a/pkgs/development/libraries/kde-frameworks/kconfig.nix b/pkgs/development/libraries/kde-frameworks/kconfig.nix
index 25bd8d183090..f703b4e56472 100644
--- a/pkgs/development/libraries/kde-frameworks/kconfig.nix
+++ b/pkgs/development/libraries/kde-frameworks/kconfig.nix
@@ -7,7 +7,10 @@
 
 mkDerivation {
   pname = "kconfig";
-  outputs = [ "out" "dev" ];
+  outputs = [
+    "out"
+    "dev"
+  ];
   nativeBuildInputs = [ extra-cmake-modules ];
   buildInputs = [ qttools ];
   propagatedBuildInputs = [ qtbase ];