expat: mark as keg-only

1 files changed, 2 insertions, 4 deletions

diff --git a/Library/Formula/expat.rb b/Library/Formula/expat.rb
index 945d8addc..fca8fe2d6 100644
--- a/Library/Formula/expat.rb
+++ b/Library/Formula/expat.rb
@@ -12,6 +12,8 @@ class Expat < Formula
     sha1 "9be7ecfc6f4e2e58361af84e303214b842c652b7" => :lion
   end
 
+  keg_only :provided_by_osx, "OS X includes Expat 1.5."
+
   option :universal
 
   def install
@@ -21,8 +23,4 @@ class Expat < Formula
                           "--mandir=#{man}"
     system "make install"
   end
-
-  def caveats
-    "Note that OS X has Expat 1.5 installed in /usr already."
-  end
 end