Install a feature after all features

Use case: I'd like to install some packages when building the container, so I wrote a Dockerfile. However, the Dockerfile is always executed before the features, so whenever I change the packages installed in the Dockerfile, the whole building process won't benefit from the cache.

Therefore, I tried to write a new feature to do that. However, then I found that the new feature is always executed first (maybe that's because path like "./features/xxx" is always executed before "ghcr.io/xxx". (I don't quite understand if that's the [fully qualified name](https://containers.dev/implementors/features/#definition-feature-equality)

Anyway, is there a way that I can force the feature to be executed at the end, such as explicitly set roundPriority? Or are there any alternatives to do so?