From ca2d815d5805da4d2e77b7f3a2548bd2eecf6375 Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Thu, 14 Oct 2021 23:22:27 +0200
Subject: [PATCH] libxmlxx3: add updateScript

---
 pkgs/development/libraries/libxmlxx/v3.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libxmlxx/v3.nix b/pkgs/development/libraries/libxmlxx/v3.nix
index 41c842220c7d..b3ff59ad41e1 100644
--- a/pkgs/development/libraries/libxmlxx/v3.nix
+++ b/pkgs/development/libraries/libxmlxx/v3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libxml2, glibmm, perl }:
+{ lib, stdenv, fetchurl, pkg-config, libxml2, glibmm, perl, gnome }:
 
 stdenv.mkDerivation rec {
   pname = "libxml++";
@@ -22,6 +22,15 @@ stdenv.mkDerivation rec {
       --replace 'docdir=''${datarootdir}' "docdir=$doc/share"
   '';
 
+  passthru = {
+    updateScript = gnome.updateScript {
+      attrPath = "libxmlxx3";
+      packageName = pname;
+      versionPolicy = "odd-unstable";
+      freeze = true;
+    };
+  };
+
   meta = with lib; {
     homepage = "http://libxmlplusplus.sourceforge.net/";
     description = "C++ wrapper for the libxml2 XML parser library, version 3";