Apple has begun seeding developers with the sixth build of tvOS 11 for testing on the fourth-generation Apple TV. This comes a week after the fifth build was released.
If your set-top-box is registered for preview builds of the OS, head over to Settings > System > Software Updates > Update Software and hit the download button.
tvOS 11 includes minor improvements but will bring the Amazon Prime Video app to the Apple TV alongside scheduled dark and light modes for viewing times. We’ll update this article if any major changes were made in the latest build.