No module named l3_nat_agent

I have quantum==2013.1 from Github and the quantum-l3-agent is failing:

Traceback (most recent call last):
  File "/usr/bin/quantum-l3-agent", line 9, in <module>
    load_entry_point('quantum==2013.1', 'console_scripts', 'quantum-l3-agent')()
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 299, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 2229, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 1948, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
ImportError: No module named l3_nat_agent

Looks like l3_nat_agent is supposed to be installed but wasn't built.

To install I did:

git clone http://github.com/openstack/quantum.git
cd quantum
python setup.py easy_install .