    # File lib/chef/provider/package/rubygems.rb, line 305
            def initialize(new_resource, run_context=nil)
              super
              if new_resource.gem_binary
                if new_resource.options && new_resource.options.kind_of?(Hash)
                  msg =  "options cannot be given as a hash when using an explicit gem_binary\n"
                  msg << "in #{new_resource} from #{new_resource.source_line}"
                  raise ArgumentError, msg
                end
                @gem_env = AlternateGemEnvironment.new(new_resource.gem_binary)
              else
                @gem_env = CurrentGemEnvironment.new
              end
            end