-debian/adjust-for-release bullseye
-dch --local ~bpo10+ --distribution bullseye-backports --force-distribution "No-change backport to Debian Bullseye"
-debuild -S -sd -nc -v$ver
+[ ! -x debian/adjust-for-release ] || debian/adjust-for-release bullseye
+dch --local ~bpo11+ --distribution bullseye-backports --force-distribution "No-change backport to Debian Bullseye"
+dpkg-buildpackage -S -sd -nc -v$ver