--- haddock-2.13.1-orig/haddock.cabal	2012-10-11 21:56:14.000000000 +1100
+++ haddock-2.13.1/haddock.cabal	2012-10-11 22:21:37.594323046 +1100
@@ -108,10 +108,6 @@
 
 library
   default-language:     Haskell2010
-  -- In a GHC tree - in particular, in a source tarball - we don't
-  -- require alex or happy
-  if !flag(in-ghc-tree)
-    build-tools: alex >= 2.3, happy >= 1.18
   build-depends:
     base >= 4.3 && < 4.7,
     filepath,