diff --git a/pkgs/by-name/gd/gdbuspp/package.nix b/pkgs/by-name/gd/gdbuspp/package.nix
index 1d371de5192f..178de797b65f 100644
--- a/pkgs/by-name/gd/gdbuspp/package.nix
+++ b/pkgs/by-name/gd/gdbuspp/package.nix
@@ -6,6 +6,7 @@
   ninja,
   glib,
   pkg-config,
+  nix-update-script,
 }:
 
 stdenv.mkDerivation rec {
@@ -30,6 +31,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ glib ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "GDBus++ - a glib2 D-Bus wrapper for C++";
     longDescription = ''
diff --git a/pkgs/by-name/op/openvpn3/package.nix b/pkgs/by-name/op/openvpn3/package.nix
index cf25ba7abce8..e6055468bc69 100644
--- a/pkgs/by-name/op/openvpn3/package.nix
+++ b/pkgs/by-name/op/openvpn3/package.nix
@@ -22,12 +22,12 @@
   gdbuspp,
   cmake,
   git,
+  nix-update-script,
   enableSystemdResolved ? true,
 }:
 
 stdenv.mkDerivation rec {
   pname = "openvpn3";
-  # also update openvpn3-core
   version = "24.1";
 
   src = fetchFromGitHub {
@@ -114,6 +114,8 @@ stdenv.mkDerivation rec {
 
   NIX_LDFLAGS = "-lpthread";
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "OpenVPN 3 Linux client";
     license = lib.licenses.agpl3Plus;