Docs missing for using the Package provider

[whyscream]

I tried installing packages using the Package provider in stead of usingpear::package, but I seem to fail at it. reading the source, this should be the correct way, but it does not work:

package { 'php-pear':
  ensure => installed,
}

package { 'PHPUnit':
  ensure => installed,
  provider => pear,
  source => 'pear.phpunit.de/PHPUnit',
  require => Package['php-pear'],
}

Could you please add some docs on how to use the module in this way? Specific details on using channels would be great.

[scurvy]

It looks like the package provider syntax only works if you use the default channel. If you specify an alternate channel via source, it fails.