May-deployment: Where to store imports ?

[Hedge]

I'm making my application ready for shipping.
I've got one import -> QtDesktop.

I put it under Contents/imports (the dylib is under Contents/imports/QtDesktop/plugin).

The I fixed its dependencies with install_name_tool -change.

Upon starting the application it keeps saying "module "QtDesktop" is not installed"

What could be wrong?