Simultaneously there are repos, enabled for home: projects: openSUSE_Factory_ARM openSUSE_Factory_PowerPC But no possibility to add openSUSE_Factory_zSystems repo via Repositories user's menu, which is responsible for s390x architecture. But, if we take a look, for example, on https://build.opensuse.org/request/show/563277 , we can see, that openSUSE_Factory_zSystems also can be present. Perhaps, openSUSE_Factory_zSystems is OFF for home: projects only. I'm not aware of 'internal kitchen' of OBS, I can suppose here only, but, if it is so, this seems rather logicless not to give possibility to test how your package can be built for s390x... Need some clearness here. Thanks!