Sorry, the patch I posted in the original message will not apply properly. I forgot I also edited the comment:
Here is the correct patch: --- rules 2022-12-21 16:34:51.000000000 -0500 +++ rules.new 2023-01-08 05:31:24.000000000 -0500 @@ -327,9 +327,9 @@ | xargs -0r gzip -9vn # By default, files in debian/tmp which are not handled by anything -# in rules are ignored. This makes them into errors. +# in rules are ignored. This lists them. override_dh_missing: - dh_missing --fail-missing + dh_missing --list-missing # We are dropping the config file /etc/default/xen which appeared in ----------snip---------- Thanks for all your work. Apart from this little problem, it appears Xen 4.17 will work well on Bookworm. Kind regards, Chuck