import Name ( Name, setNameUnique, mkSysTvName )
import VarSet
import VarEnv
-import CmdLineOpts ( dopt, DynFlag(..) )
+import DynFlags ( dopt, DynFlag(..) )
import UniqSupply ( uniqsFromSupply )
import Util ( nOfThem, isSingleton, equalLength, notNull )
import ListSetOps ( removeDups )