[Haskell-cafe] How to implement instance of MonadBaseControl IO

I have a `newtype Yun a = Yun { unYun :: ReaderT YunEnv (ResourceT IO) a }` , and i need to define an instance of `MonadBaseControl IO` for it. Newtype instance deriving don't work here. I guess the answer is simple, i just can't figure it out, hope anybody can lightening me. Best regards. Yihuang.