haskell-platform 2013.2.0.0

Closes Homebrew/homebrew#20112.

Formula/haskell-platform.rb

@@ -2,14 +2,16 @@ require 'formula'
 
 class HaskellPlatform < Formula
   homepage 'http://hackage.haskell.org/platform/'
-  url 'http://lambda.haskell.org/platform/download/2012.4.0.0/haskell-platform-2012.4.0.0.tar.gz'
-  sha1 '7976508c50305969f64c721a1d095ae22efff8b7'
+  url 'http://lambda.haskell.org/platform/download/2013.2.0.0/haskell-platform-2013.2.0.0.tar.gz'
+  sha1 '8669bb5add1826c0523fb130c095fb8bf23a30ce'
 
   depends_on 'ghc'
 
+  conflicts_with 'cabal-install'
+
   def install
     # libdir doesn't work if passed to configure, needs to be set in the environment
-    system "./configure", "--prefix=#{prefix}", "--enable-unsupported-ghc-version"
+    system "./configure", "--prefix=#{prefix}"
     ENV['EXTRA_CONFIGURE_OPTS'] = "--libdir=#{lib}/ghc"
     system "make install"
   end