Unity 5 takes forever to build Android

Hi, it builds fine when there are no static objects in the scene. But when I make some objects static, the build time is very slow (canceled it after 2 hours).
I don't need all that stuff, like lightning transform. There isn't even a light source in the scene.

How can I use static objects (only for static batching) while still having reasonable build times? (like in Unity 4)