pear installation via ansible

gistfile1.txt

- name: PEAR installing modules
  command: pear install {{ item }}
  register: pear_result
  with_items:
      - pear.netpirates.net/phpDox
      - pear.symfony.com/Yaml
      - pear.phpmd.org/PHP_PMD
  changed_when: pear_result.stdout.find("already installed") == -1  
  
  results in errors like this:
  
  failed: [127.0.0.1] => (item=pear.netpirates.net/phpDox) => {"changed": false, "cmd": ["pear", "install", "pear.netpirates.net/phpDox"], "delta": "0:00:00.060846", "end": "2014-01-24 06:13:59.860506", "item": "pear.netpirates.net/phpDox", "rc": 1, "start": "2014-01-24 06:13:59.799660", "stdout_lines": ["theseer/phpDox is already installed and is the same as the released version 0.6.3", "install failed"]}
stdout: theseer/phpDox is already installed and is the same as the released version 0.6.3
install failed