diff --git a/ghc/compiler/simplStg/UpdAnal.lhs b/ghc/compiler/simplStg/UpdAnal.lhs
index ecd8ed170797af56723b45babf36dda9b8720b85..59768a2d9f1434bff28c2a661be8367474d30980 100644
--- a/ghc/compiler/simplStg/UpdAnal.lhs
+++ b/ghc/compiler/simplStg/UpdAnal.lhs
@@ -14,6 +14,8 @@
 >
 > IMP_Ubiq(){-uitous-}
 >
+> import Prelude hiding ( lookup )
+>
 > import StgSyn
 > import Id		( SYN_IE(IdEnv), growIdEnv, addOneToIdEnv, combineIdEnvs, nullIdEnv, 
 >			  unitIdEnv, mkIdEnv, rngIdEnv, lookupIdEnv, 
diff --git a/ghc/compiler/specialise/SpecEnv.lhs b/ghc/compiler/specialise/SpecEnv.lhs
index f9a0949faa230a07ab34ec23092104e19b9f1ad2..0c40e2411628c037cd07c89a7112e6c79604b8b7 100644
--- a/ghc/compiler/specialise/SpecEnv.lhs
+++ b/ghc/compiler/specialise/SpecEnv.lhs
@@ -15,7 +15,7 @@ module SpecEnv (
 IMP_Ubiq()
 
 import MatchEnv
-import Type		( matchTys, isTyVarTy )
+import Type		--( matchTys, isTyVarTy )
 import Usage		( SYN_IE(UVar) )
 import OccurAnal	( occurAnalyseGlobalExpr )
 import CoreSyn		( SYN_IE(CoreExpr), SYN_IE(SimplifiableCoreExpr) )
@@ -27,7 +27,7 @@ import Maybes		( MaybeErr(..) )
 --import Pretty--ToDo:rm
 --import PprCore--ToDo:rm
 --import Id--ToDo:rm
---import TyVar--ToDo:rm
+import TyVar --ToDo:rm
 --import Unique--ToDo:rm
 --import IdInfo--ToDo:rm
 --import PprEnv--ToDo:rm
@@ -79,7 +79,7 @@ isNullSpecEnv (SpecEnv env) = null (mEnvToList env)
 
 addOneToSpecEnv :: SpecEnv -> [Type] -> CoreExpr -> MaybeErr SpecEnv ([Type], SimplifiableCoreExpr)
 addOneToSpecEnv (SpecEnv env) tys rhs 
-  = --pprTrace "addOneToSpecEnv" (ppAbove (ppr PprDebug tys) (ppr PprDebug rhs)) $
+  = --pprTrace "addOneToSpecEnv" (($$) (ppr PprDebug tys) (ppr PprDebug rhs)) $
     case (insertMEnv matchTys env tys (occurAnalyseGlobalExpr rhs)) of
 	Succeeded menv -> Succeeded (SpecEnv menv)
 	Failed err     -> Failed err