Vagrantfile.rb

#Why does this work:
   config.vm.provision :chef_solo do |chef|
     chef.cookbooks_path = "cookbooks"
     chef.add_recipe "vagrant_main"
   end


#But not this:
    config.vm.provision :chef_solo do |chef|
     chef.cookbooks_path = "cookbooks"
     chef.add_recipe "vagrant_main"
     chef.json = { :mysql_password => "" , :rails => { :version => "3.0.5" } }
   end