--- wikisrc/ports/xen/howto.mdwn	2014/12/24 15:56:04	1.35
+++ wikisrc/ports/xen/howto.mdwn	2014/12/24 16:02:49	1.36
@@ -152,6 +152,24 @@ Therefore, this HOWTO recommends running
 xl, the NetBSD 6 stable branch, and to use an amd64 kernel as the
 dom0.  Either the i386 or amd64 of NetBSD may be used as domUs.
 
+Build problems
+--------------
+
+Ideally, all versions of Xen in pkgsrc would build on all versions of
+NetBSD on both i386 and amd64.  However, that isn't the case.  Besides
+aging code and aging compilers, qemu (included in xentools for HVM
+support) is difficult to build.  The following are known to fail:
+
+        xenkernel3 netbsd-6 i386
+        xentools42 netbsd-6 i386 
+
+The following are known to work:
+
+        xenkernel41 netbsd-5 amd64
+        xentools41 netbsd-5 amd64
+        xenkernel41 netbsd-6 i386
+        xentools41 netbsd-6 i386
+
 NetBSD as a dom0
 ================
 
@@ -584,7 +602,7 @@ working vif-bridge is also provided with
 
     #!/bin/sh
     #============================================================================
-    # $NetBSD: howto.mdwn,v 1.34 2014/12/24 15:55:32 gdt Exp $
+    # $NetBSD: howto.mdwn,v 1.35 2014/12/24 15:56:04 gdt Exp $
     #
     # /usr/pkg/etc/xen/vif-bridge
     #