setting hostname via ansible

main.yml

- name: Set the hostname in rc.conf
  lineinfile: dest=/etc/rc.conf regexp="^hostname" line='hostname="{{ hostname }}"'
  register: hostname

- name: Set the hostname
  shell: hostname {{ hostname }}
  when: hostname.changed

output

TASK: [Set the hostname in rc.conf] ******************************************* 
changed: [admin] => {"changed": true, "item": "", "msg": "line replaced"}

TASK: [Set the hostname] ****************************************************** 
failed: [admin] => {"changed": true, "cmd": "hostname {u'msg': u'line replaced', 'item': '', u'changed': True, 'invocation': {'module_name': 'lineinfile', 'module_args': u'dest=/etc/rc.conf regexp=\"^hostname\" line=\\'hostname=\"foobar.network.local\"\\''}} ", "delta": "0:00:00.001940", "end": "2013-06-13 10:02:25.053085", "item": "", "rc": 2, "start": "2013-06-13 10:02:25.051145"}
stderr: Syntax error: Unterminated quoted string

FATAL: all hosts have already failed -- aborting