module-puppetlabs-apt/manifests/force.pp

# force.pp
# force a package from a specific release

define apt::force(
  $release = 'testing',
  $version = false
) {

  exec { "/usr/bin/aptitude -y -t ${release} install ${name}":
    unless => $version ? {
      false => "/usr/bin/dpkg -l | grep ${name}",
      default => "/usr/bin/dpkg -l | grep ${name} | grep ${version}"
    }
  }

}