GHC.Utils.Monad.State.{Strict,Lazy} derive (non-one-shot) Functor

I was surprised to see that we seem to manually define Applicative and Monad instances, but not the Functor instance for State:

newtype State s a = State' { runState' :: s -> (# a, s #) }
    deriving (Functor)

The derived instance will not make use of the one-shot State synonym. Maybe it doesn't matter match, because (>>=) is the most commonly used combinator by far, still it seems strange not to define it manually.