Kotlin - Generic abstract class that implements generic Interface

I have this abstract class which accepts an interface as generic type:

abstract class A<T: GenericInterface> : T {
  ...
}

The problem is that the compiler will not allow me to do this and will through this error:

Only classes and interfaces may serve as supertypes

Is it any workaround about this case?

I want my classes to extends the abstract class A passing a custom interface that extends GenericInterface and to be able to implement that custom interface methods.

This is the prototype of what I'm trying to achieve:

abstract class A<T: GenericInterface> : T {
  ...
}

interface CustomInterface: GenericInterface {

  ...
}

class B: A<CustomInterface> {

  // Here I want to override CustomInterface funs

}

I know that I can always use this approach:

class B: A, CustomInterface {

  // override CustomInterface funs here

}

but for code pattern purposes I would like the other solution