zurb-foundation - Puppet のインストール gem は失敗しますが、gem はインストールされます

Question

Zurb Foundation gem をインストールする Puppet マニフェストがあります。

class compass {
    package { ["rubygems"]:
        ensure => 'installed'
    }
    package { ['zurb-foundation']:
        ensure => '3.0.6',
        provider => 'gem',
        require => Package['rubygems']
    }
}

これにより、実行時に次のエラーが発生しますpuppet apply。

err: /Stage[main]/Compass/Package[zurb-foundation]/ensure: change from absent to 3.0.6 failed: Could not update: Execution of '/usr/bin/gem install -v 3.0.6 --include-dependencies --no-rdoc --no-ri zurb-foundation' returned 1: INFO:  `gem install -y` is now default and will be removed
INFO:  use --ignore-dependencies to install only the gems you list
Building native extensions.  This could take a while...
ERROR:  Error installing zurb-foundation:
    ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from extconf.rb:4:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/ffi-1.9.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/ffi-1.9.0/ext/ffi_c/gem_make.out
 at /etc/puppet/manifests/classes/compass.pp:25

ただし、 を実行するgem listと、次の結果が得られます。

# gem list

*** LOCAL GEMS ***

chunky_png (1.2.8)
compass (0.12.2)
fssm (0.2.10)
rake (10.1.0)
rb-fsevent (0.9.3)
sass (3.2.0.alpha.277)
zurb-foundation (3.0.6)

puppet apply失敗した依存関係のために多くのアイテムがスキップされるため、エラーが原因で正しく完了しません。私に何ができる？