import HsSyn -- oodles of it
-- others:
-import Id ( idName, idType, isLocalId, setIdType, isIP, Id )
+import Id ( idName, idType, isLocalId, setIdType, Id )
import DataCon ( dataConWrapId )
import TcEnv ( tcLookupGlobal_maybe, tcExtendGlobalValEnv,
TcEnv, TcId