jam/ftjam conflict

Formula/ftjam.rb

@@ -5,6 +5,8 @@ class Ftjam < Formula
   url 'http://downloads.sourceforge.net/project/freetype/ftjam/2.5.2/ftjam-2.5.2.tar.bz2'
   sha1 '08bad35e74ec85c4592d378014586174d22297b5'
 
+  conflicts_with 'jam', :because => 'both install a `jam` binary'
+
   def install
     system "./configure", "--prefix=#{prefix}"
     system 'make'

Formula/jam.rb

@@ -5,6 +5,8 @@ class Jam < Formula
   url 'ftp://ftp.perforce.com/jam/jam-2.5.zip'
   sha1 '794a3f4483315c6b9f010f03b592646d3815328c'
 
+  conflicts_with 'ftjam', :because => 'both install a `jam` binary'
+
   def install
     system "make", "CC=#{ENV.cc}", "CFLAGS=#{ENV.cflags}"
     bin.install "bin.macosx/jam", "bin.macosx/mkjambase"