Correct way of installing phantomjs

Library/Formula/phantomjs.rb

@@ -1,16 +1,29 @@
 require 'formula'
 
+class NeedsSnowLeopardOrNewer < Requirement
+  def satisfied?
+    MacOS.snow_leopard?
+  end
+
+  def message
+    "PhantomJS requires Mac OS X 10.6 (Snow Leopard) or newer."
+  end
+end
+
 class Phantomjs < Formula
-  url "https://phantomjs.googlecode.com/files/phantomjs-1.4.1-source.tar.gz"
-  head "https://github.com/ariya/phantomjs.git"
+  url "http://phantomjs.googlecode.com/files/phantomjs-1.5.0-macosx-static.zip"
   homepage 'http://www.phantomjs.org/'
-  sha1 "d9386aa3e36bdd31f069f5301e315a9c5d91f06a"
-
-  depends_on 'qt'
+  sha1 'b87152ce691e7ed1937d30f86bc706a408d47f64'
+  
+  depends_on NeedsSnowLeopardOrNewer.new
 
   def install
-    system "qmake -spec macx-g++"
-    system "make"
     bin.install "bin/phantomjs"
   end
+
+  def caveats; <<-EOS.undent
+    This version of PhantomJS does not hide the dock icon.
+    For more information see: http://code.google.com/p/phantomjs/issues/detail?id=281
+    EOS
+  end
 end