import Type ( mkTyConApp, mkSynTy, Type )
import TyVar ( emptyTyVarEnv )
import TysWiredIn ( unitTy )
-import PrelMods ( gHC_MAIN, mAIN )
+import PrelMods ( pREL_MAIN, mAIN )
import PrelInfo ( main_NAME, ioTyCon_NAME )
import Unify ( unifyTauTy )
import UniqFM ( lookupUFM_Directly, lookupWithDefaultUFM_Directly,