https://bugs.gentoo.org/890178
https://github.com/stapelberg/X11-XCB/pull/3

From 95539af3ff38ebc221f92893aade612305c2aba8 Mon Sep 17 00:00:00 2001
From: Peter Levine <plevine457@gmail.com>
Date: Mon, 16 Jan 2023 03:40:24 -0500
Subject: [PATCH 1/2] Fix undeclared __PACKAGE__ in C context

--- a/XCB.xs
+++ b/XCB.xs
@@ -180,7 +180,7 @@ _connect_and_attach_struct(self)
   PREINIT:
     XCBConnection *xcbconnbuf;
   CODE:
-    assert(sv_derivered_from(self, __PACKAGE__));
+    assert(sv_derivered_from(self, HvNAME(PL_curstash)));
     SV **disp = hv_fetch((HV*)SvRV(self), "display", strlen("display"), 0);
     if(!disp)
         croak("Attribute 'display' is required");

From 0922360b6fc1d2273dd3e15d0584bea983fdde9a Mon Sep 17 00:00:00 2001
From: Peter Levine <plevine457@gmail.com>
Date: Mon, 16 Jan 2023 03:42:08 -0500
Subject: [PATCH 2/2] Fix typo in  'sv_derived_from'

--- a/XCB.xs
+++ b/XCB.xs
@@ -180,7 +180,7 @@ _connect_and_attach_struct(self)
   PREINIT:
     XCBConnection *xcbconnbuf;
   CODE:
-    assert(sv_derivered_from(self, HvNAME(PL_curstash)));
+    assert(sv_derived_from(self, HvNAME(PL_curstash)));
     SV **disp = hv_fetch((HV*)SvRV(self), "display", strlen("display"), 0);
     if(!disp)
         croak("Attribute 'display' is required");