: Could not find module ‘Control.Monad.Trans.State’ Perhaps you meant Control.Monad.Trans.State (from transformers-0.4.1.0@trans_5jw4w9yTgmZ89ByuixDAKP) Control.Monad.Trans.Class (from transformers-0.4.1.0@trans_5jw4w9yTgmZ89ByuixDAKP) Control.Monad.Trans.Cont (from transformers-0.4.1.0@trans_5jw4w9yTgmZ89ByuixDAKP)