I put together some changes to resolve this (not a debian developer so cannot publish but in case helpful)
Python-k5test (required to build python-krb5) https://salsa.debian.org/morisja/python-k5test/-/tree/debian?ref_type=heads python-krb5 https://salsa.debian.org/morisja/python-krb5/-/tree/debian?ref_type=heads The above two replicate the packaging approach used by python-requests-kerberos, install the openstack build helpers, then use debian/rules export-orig-xz, to generate the orig tarball PR to update python-requests-kerberos to add python-krb5 as a dependency https://salsa.debian.org/openstack-team/python/python-requests-kerberos/-/merge_requests/2
