require 'chef_metal'
require 'chef/resource/vagrant_cluster'
require 'chef/provider/vagrant_cluster'
require 'chef/resource/vagrant_box'
require 'chef/provider/vagrant_box'
require 'chef_metal_vagrant/vagrant_provisioner'

module ChefMetalVagrant
  def self.with_vagrant_box(run_context, box_name, vagrant_options = {}, &block)
    if box_name.is_a?(Chef::Resource::VagrantBox)
      new_options = { 'vagrant_options' => { 'vm.box' => box_name.name } }
      new_options['vagrant_options']['vm.box_url'] = box_name.url if box_name.url
    else
      new_options = { 'vagrant_options' => { 'vm.box' => box_name } }
    end

    run_context.chef_metal.add_provisioner_options(new_options, &block)
  end
end

class Chef
  class Recipe
    def with_vagrant_cluster(cluster_path, &block)
      with_provisioner(ChefMetalVagrant::VagrantProvisioner.new(cluster_path), &block)
    end

    def with_vagrant_box(box_name, vagrant_options = {}, &block)
      ChefMetalVagrant.with_vagrant_box(run_context, box_name, vagrant_options, &block)
    end
  end
end

require 'chef_metal'
require 'chef/resource/vagrant_cluster'
require 'chef/provider/vagrant_cluster'
require 'chef/resource/vagrant_box'
require 'chef/provider/vagrant_box'
require 'chef_metal_vagrant/vagrant_provisioner'

module ChefMetalVagrant
  def self.with_vagrant_box(run_context, box_name, vagrant_options = {}, &block)
    if box_name.is_a?(Chef::Resource::VagrantBox)
      provisioner_options ||= box_name.provisioner_options || {}
      provisioner_options['vagrant_options'] ||= {}
      provisioner_options['vagrant_options']['vm.box'] = box_name.name
      provisioner_options['vagrant_options']['vm.box_url'] = box_name.url if box_name.url
    else
      provisioner_options ||= {}
      provisioner_options['vagrant_options'] ||= {}
      provisioner_options['vagrant_options']['vm.box'] = box_name
    end

    run_context.chef_metal.with_provisioner_options(provisioner_options, &block)
  end
end

class Chef
  class Recipe
    def with_vagrant_cluster(cluster_path, &block)
      with_provisioner(ChefMetalVagrant::VagrantProvisioner.new(cluster_path), &block)
    end

    def with_vagrant_box(box_name, vagrant_options = {}, &block)
      ChefMetalVagrant.with_vagrant_box(run_context, box_name, vagrant_options, &block)
    end
  end
end

--- 
+++ 
@@ -8,17 +8,13 @@
 module ChefMetalVagrant
   def self.with_vagrant_box(run_context, box_name, vagrant_options = {}, &block)
     if box_name.is_a?(Chef::Resource::VagrantBox)
-      provisioner_options ||= box_name.provisioner_options || {}
-      provisioner_options['vagrant_options'] ||= {}
-      provisioner_options['vagrant_options']['vm.box'] = box_name.name
-      provisioner_options['vagrant_options']['vm.box_url'] = box_name.url if box_name.url
+      new_options = { 'vagrant_options' => { 'vm.box' => box_name.name } }
+      new_options['vagrant_options']['vm.box_url'] = box_name.url if box_name.url
     else
-      provisioner_options ||= {}
-      provisioner_options['vagrant_options'] ||= {}
-      provisioner_options['vagrant_options']['vm.box'] = box_name
+      new_options = { 'vagrant_options' => { 'vm.box' => box_name } }
     end
 
-    run_context.chef_metal.with_provisioner_options(provisioner_options, &block)
+    run_context.chef_metal.add_provisioner_options(new_options, &block)
   end
 end
 
Use new "add_provisioner_options" in chef-metal
