otherwise there's build error:
error: Could not open %files file /home/builder/rpm/BUILD/haproxy-1.8.14/debugfiles.list: No such file or directory
docker exec --user=root $name cleanbuild/findunusedbr -c / rpm/packages/$package/$package.spec
# actual build
- docker exec $name cleanbuild/teeboth $buildlog builder -nn -bb $package --define 'clean exit 0' && rc=$? || rc=$?
+ docker exec $name cleanbuild/teeboth $buildlog builder -nn -bb $package --define '__spec_clean_body %{nil}' && rc=$? || rc=$?
findbr=$package.findbr.log
builddir=$(docker exec $name sh -c 'test ! -d rpm/BUILD/* || echo rpm/BUILD/*')