Comment 1 for bug 1809860

Libluajit-5.1-dev is a non-optional build-dep for sysbench releases more recent than the ancient version in xenial. Hence, this is not a bug in the sysbench package unless/until one can show there's something wrong with the dependency itself. Otherwise, if you want sysbench to build on s390x, you'll have to ensure its build-deps are present and accounted for on that architecture.