the trait bound PhysicsBundle<'_, '_, f32, NPhysicsBackend>: SystemBundle<'_, '_> is not satisfied

[rosenjcb]

I get this error:

error[E0277]: the trait bound `PhysicsBundle<'_, '_, f32, NPhysicsBackend>: SystemBundle<'_, '_>` is not satisfied
   --> src\main.rs:227:22
    |
227 |         .with_bundle(PhysicsBundle::<f32, NPhysicsBackend>::new()).unwrap()
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `SystemBundle<'_, '_>` is not implemented for `PhysicsBundle<'_, '_, f32, NPhysicsBackend>`

And I import these types in as such:

use amethyst_physics::PhysicsBundle;
use amethyst_nphysics::NPhysicsBackend;

The reason why I do that is because I think NPhysicsBackend was moved out of amethyst a while ago. Any clue what's up?

[starwolfy]

I work with the Amethyst master branch and I get the same issue with version 0.2.0 of physics and nphysics. Has there been an undocumented API change in this area or are there compatibility issues at the moment?