diff --git a/parsec.cabal b/parsec.cabal
--- a/parsec.cabal
+++ b/parsec.cabal
@@ -1,5 +1,6 @@
+cabal-version: >= 1.2
 name:		parsec
-version:	2.1.0.0
+version:	2.1.0.1
 license:	BSD3
 license-file:	LICENSE
 author:		Daan Leijen <daan@cs.uu.nl>
@@ -8,21 +9,27 @@
 category:	Parsing
 synopsis:	Monadic parser combinators
 description:
-	Parsec is designed from scratch as an industrial-strength parser
-	library.  It is simple, safe, well documented (on the package
-	homepage), has extensive libraries and good error messages,
-	and is also fast.
+    Parsec is designed from scratch as an industrial-strength parser
+    library.  It is simple, safe, well documented (on the package
+    homepage), has extensive libraries and good error messages,
+    and is also fast.
 build-type:     Simple
-exposed-modules:
-	Text.ParserCombinators.Parsec.Error,
-	Text.ParserCombinators.Parsec.Char,
-	Text.ParserCombinators.Parsec.Combinator,
-	Text.ParserCombinators.Parsec.Expr,
-	Text.ParserCombinators.Parsec.Language,
-	Text.ParserCombinators.Parsec.Perm,
-	Text.ParserCombinators.Parsec.Pos,
-	Text.ParserCombinators.Parsec.Prim,
-	Text.ParserCombinators.Parsec.Token,
-	Text.ParserCombinators.Parsec
-build-depends:	base
-extensions:	ExistentialQuantification, PolymorphicComponents
+library {
+  exposed-modules:
+    Text.ParserCombinators.Parsec.Error,
+    Text.ParserCombinators.Parsec.Char,
+    Text.ParserCombinators.Parsec.Combinator,
+    Text.ParserCombinators.Parsec.Expr,
+    Text.ParserCombinators.Parsec.Perm,
+    Text.ParserCombinators.Parsec.Pos,
+    Text.ParserCombinators.Parsec.Prim,
+    Text.ParserCombinators.Parsec
+  build-depends:	base
+  extensions:	ExistentialQuantification
+  if !impl(nhc98) {
+    extensions:	PolymorphicComponents
+    exposed-modules:
+      Text.ParserCombinators.Parsec.Language,
+      Text.ParserCombinators.Parsec.Token
+  }
+}