puppet custom facter problem

##### node manifest

node mynode01 {
  include trialfact
}

##### trialfact module


## /module_path/trialfact/manifests/init.pp

class trialfact {
  file{ "/tmp/check":
    ensure => present,
    content => ">>>>> $::custom_store <<<<<"
  }
}


## /module_path/trialfact/lib/facter/custom_label.rb

Facter.add("custom_version") do
  setcode do
    "160"
  end
end