ansible: don't depend on :python.

Use the system Python instead.

Formula/ansible.rb

@@ -7,7 +7,7 @@ class Ansible < Formula
 
   head 'https://github.com/ansible/ansible.git', :branch => 'devel'
 
-  depends_on :python
+  depends_on :python if MacOS.version <= :snow_leopard
   depends_on 'libyaml'
 
   option 'with-accelerate', "Enable accelerated mode"
@@ -45,6 +45,7 @@ class Ansible < Formula
   end
 
   def install
+    ENV["PYTHONPATH"] = lib+"python2.7/site-packages"
     ENV.prepend_create_path 'PYTHONPATH', libexec+'lib/python2.7/site-packages'
     # HEAD additionally requires this to be present in PYTHONPATH, or else
     # ansible's own setup.py will fail.