Setup fails when using default PHPUnit version

I get the following error when "starting" Vagrant with this cookbook's default PHPUnit version (3.6.11):

[2013-03-14T10:01:25+01:00] FATAL: Mixlib::ShellOut::ShellCommandFailed: chef-php-extra_pear[PHPUnit] (chef-php-extra::PHPUnit line 37) had an error: Mixlib::ShellOut::ShellCommandFailed: Expected process to exit with [0], but received '1'
---- Begin output of echo -e "\r" | pear -d preferred_state=stable install -a pear.phpunit.de/PHPUnit-3.6.11 ----
STDOUT: Duplicate package channel://pear.phpunit.de/Text_Template-1.1.3 found
Duplicate package channel://pear.phpunit.de/Text_Template-1.1.2 found
install failed
STDERR: 
---- End output of echo -e "\r" | pear -d preferred_state=stable install -a pear.phpunit.de/PHPUnit-3.6.11 ----
Ran echo -e "\r" | pear -d preferred_state=stable install -a pear.phpunit.de/PHPUnit-3.6.11 returned 1

When configuring it with PHPUnit 3.7.18 (latest) it works fine. I guess setting the defaults to 3.7.x should solve this. I am super new to Vagrant/Chef, so not sure if there could be another reason for this to fail