--- zlib/debian/control.orig	2010-01-01 11:12:50.000000000 -0800
+++ zlib/debian/control	2010-02-15 09:29:23.000000000 -0800
@@ -11,7 +11,7 @@
   , ghc6-prof
   , zlib1g-dev
   , ghc6-doc
-  , haddock (>= 2.4.2-3)
+  , ghc6 (>= 6.13) | haddock (>= 2.4.2-3)
   , hscolour
 Homepage: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/zlib
 Vcs-Darcs: http://darcs.debian.org/darcs/pkg-haskell/haskell-zlib