# File lib/rvm/environment/utility.rb, line 170
    def use_env_from_result!(result)
      if compatible_with_current?(result)
        ENV['GEM_HOME']    = result[:GEM_HOME]
        ENV['GEM_PATH']    = result[:GEM_PATH]
        Gem.clear_paths if defined?(Gem)
      else
        raise IncompatibleRubyError.new(result, "The given ruby environment requires #{ruby_string(result)} (versus #{self.class.current_ruby_string})")
      end
    end