It really is the way to do it. Then you are also version-controlling your build-setup and if the cloud or your self-host solution is down at the wrong time you

It really is the way to do it. Then you are also version-controlling your build-setup and if the cloud or your self-host solution is down at the wrong time you can instantly run an equivalent build locally. The cloud is really about one thing and one thing only. Vendor lock-in. I don't accept that. And I don't see any sensible reason for it.