Puppet users - May 2013 - hiera json backend broken on puppet 3.1.1 for windows

Hello, 


Sems that hiera json backend is broken on puppet 3.1.1 for windows :-(


From this example:  
http://www.craigdunn.org/2011/10/puppet-configuration-variables-and-hiera/


-- hiera.yaml --

C:\Users\Administrator\temp>type hiera.yaml
:backends: - json

:logger: console

:hierarchy: - %{env}
            - common
:json:
   :datadir: hieradata


C:\Users\Administrator\temp\hieradata>type common.json
{
  "webname": "localhost"
}

C:\Users\Administrator\temp\hieradata>type dev.json
{
  "webname": "dev.app.local"
}


C:\Users\Administrator\temp>hiera -c hiera.yaml webname
C:/Puppet/sys/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in 
`gem
original_require'': no such file to load -- json (LoadError)
        from 
C:/Puppet/sys/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.
b:36:in `require''
        from C:/Puppet/hiera/lib/hiera/backend/json_backend.rb:5:in 
`initialize

        from C:/Puppet/hiera/lib/hiera/backend.rb:158:in `new''
        from C:/Puppet/hiera/lib/hiera/backend.rb:158:in `lookup''
        from C:/Puppet/hiera/lib/hiera/backend.rb:156:in `each''
        from C:/Puppet/hiera/lib/hiera/backend.rb:156:in `lookup''
        from C:/Puppet/hiera/lib/hiera.rb:62:in `lookup''
        from C:/Puppet/hiera/bin/hiera:220
---
Any clues ?



-Geronimo

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