Augeas support on my stroller?

I am trying to get augeas support on my stroller.

I tried installing the package with these directives:

package { "augeas-tools":   ensure => installed }
package { "libaugeas-dev":  ensure => installed }
package { "libaugeas-ruby": ensure => installed }

When I try to use augeas on my manifests, after loading vm I get this error:

err: Could not find a suitable provider for augeas

I am using the exact32 official box with Vagrant 1.0.3.

Vagrant 1.0.3 has ruby ​​1.8.7 and puppet 2.7.14

$ ruby -v
$ ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-linux]
$ puppet help
$ Puppet v2.7.14

This is my little manifest with the php class , which is included after the apache , mysql and other classes checked separately. Everything is working correctly, with the exception of the augeas team.

class php {

    exec { "apt-update":
        command     => "/usr/bin/apt-get update",
        refreshonly => true;
    }

    package { "augeas-tools":   ensure => installed }
    package { "libaugeas-dev":  ensure => installed }
    package { "libaugeas-ruby": ensure => installed }

    package { "php5":               ensure => installed }
    package { "php5-cli":           ensure => installed }
    package { "php5-xdebug":        ensure => installed }
    package { "php5-curl":          ensure => installed }
    package { "php5-intl":          ensure => installed }
    package { "php5-imap":          ensure => installed }
    package { "php5-mcrypt":        ensure => installed }
    package { "php5-imagick":       ensure => installed }
    package { "php5-sqlite":        ensure => installed }
    package { "php5-gd":            ensure => installed }
    package { "php-apc":            ensure => installed }

    package { 
        "libapache2-mod-php5" : 
            ensure => installed,
            require => Package["php5"]
    }

    augeas { "php-cli":
        require =>  [
                        Package["php5"],
                        Package["augeas-tools"],
                        Package["libaugeas-dev"],
                        Package["libaugeas-ruby"],
                    ],
        context => "/etc/php5/cli/php.ini",
        changes => [
            "set date.timezone Europe/Rome",
            "set short_open_tag Off",
        ];
    }

    augeas { "php-apache":
        require =>  [
                        Package["php5"],
                        Package["augeas-tools"],
                        Package["libaugeas-dev"],
                        Package["libaugeas-ruby"],
                    ],
        context => "/etc/php5/apache2/php.ini",
        changes => [
            "set date.timezone Europe/Rome",
            "set short_open_tag Off",
        ];
    }

}

After installing the packages, entering the vagrant machine with "vagrant ssh", I run:

vagrant@precise32:~$ ruby -raugeas -e "puts Augeas.open"
#<Augeas:0xb77a3598>

Thanks in advance!