Regression in standalone Data deriving for phantom types

Thise code

{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving, PolyKinds #-}
module M where
import Data.Data
import Data.Typeable

data Phantom t = Phantom
  deriving Typeable
deriving instance Typeable t => Data (Phantom t)

compiles with 7.8.4 but not with 7.10.2. The error is

data.hs:8:1:
    Could not deduce (Typeable Phantom)
      arising from the superclasses of an instance declaration
    from the context (Typeable t)
      bound by the instance declaration at data.hs:8:1-48
    In the instance declaration for ‘Data (Phantom t)’

PolyKinds here is a hack I came up with to make this compile with 7.8 (without it, the code doesn't compile with either version); but ideally, this code should compile whether PolyKinds is enabled or not.