diff --git a/pkgs/development/libraries/libical/default.nix b/pkgs/development/libraries/libical/default.nix
index 3656d2991a82..3fef461874c9 100644
--- a/pkgs/development/libraries/libical/default.nix
+++ b/pkgs/development/libraries/libical/default.nix
@@ -64,6 +64,8 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DENABLE_GTK_DOC=False"
+    "-DGOBJECT_INTROSPECTION=True"
+    "-DICAL_GLIB_VAPI=True"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "-DIMPORT_ICAL_GLIB_SRC_GENERATOR=${lib.getDev buildPackages.libical}/lib/cmake/LibIcal/IcalGlibSrcGenerator.cmake"
   ];