diff --git a/pkgs/applications/kde/kcontacts.nix b/pkgs/applications/kde/kcontacts.nix
index d73f7f64625d..12b3198a26b2 100644
--- a/pkgs/applications/kde/kcontacts.nix
+++ b/pkgs/applications/kde/kcontacts.nix
@@ -12,4 +12,5 @@ mkDerivation {
   };
   nativeBuildInputs = [ extra-cmake-modules ];
   buildInputs = [ kcoreaddons kconfig kcodecs ki18n qtbase ];
+  outputs = [ "out" "dev" ];
 }