World Partition: How to package project using manually commandlet-cooked map and not to replace is with editor-cooked map?

[slam.js]

I have a map with World Partition.
The only way to cook it is to use commandlet - I did it.

But when I try to package project it clears all cooked content and cooks it from scratch, as a result manually commandlet-cooked map is replaced with editor-cooked map, which breaks world partition in packaged project…

How can I fix this?