diff --git a/haddock.cabal b/haddock.cabal
index 84d3c2a..9587450 100644
--- a/haddock.cabal
+++ b/haddock.cabal
@@ -78,10 +78,6 @@ flag test
 
 executable haddock
   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 && < 4.6,
     filepath,
@@ -140,10 +136,6 @@ executable haddock
    
 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 && < 4.6,
     filepath,