NavMesh with procedural streaming levels

What is the best option to use nav-meshes with procedural generation using streaming levels? Currently i habe a nav-volume and nav-mesh in every level. But for some reason that is not working when i package the game. In the editor everything works fine. I also heard putting nav-mesh and volume in the persistent level. But how can i adjust the size of the volume to the size of the dungeon at runtime? I tried some different approaches but until now without success. What is the proper way to create a nav-mesh for procedural loaded streaming levels?