anchor.diff:      websocket = g.websocket_1_0_7;
       xml_simple = g.xml_simple_1_1_1;
     };
  -  gem_nix_args = [ ''autotest-rails'' ''buildr'' ''fakes3'' ''foreman'' ''nix'' ''rails'' ''rake'' ''rb-fsevent'' ''sass'' ''selenium-webdriver'' ];
  +  gem_nix_args = [ ''autotest-rails'' ''buildr'' ''fakes3'' ''foreman'' ''nix'' ''rails'' ''rake'' ''rb-fsevent'' ''sass'' ''selenium-webdriver'' ''sinatra-1.3.2'' ];
     gems = {
       ZenTest_4_8_4 = {
         basename = ''ZenTest'';
  
positive.code:       requiredGems = [ g.rack_1_5_1 ];
        sha256 = ''073ffpsqmy4nqxz178qisb3a4v3305c49ypj0jw6s9mkz02yvgq2'';
      };
      rack_ssl_1_3_3 = {
        basename = ''rack_ssl'';
        meta = {
  
negative.code:       requiredGems = [ g.childprocess_0_3_7 g.websocket_1_0_7 ];
        sha256 = ''0c5fybp19mawq07h59b16h736pz8sz017m1pwalb6mcyliqmlwcj'';
      };
      sinatra_1_3_2 = {
        basename = ''sinatra'';
        meta = {
          description = ''Classy web-development dressed in a DSL'';
          homepage = ''http://www.sinatrarb.com/'';
          longDescription = ''Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.'';
        };
        name = ''sinatra-1.3.2'';
        requiredGems = [ g.rack_protection_1_3_2 ];
        sha256 = ''05blf915zpiwyz7agcn9rwdmddwxz0z4l3gd4qlqmrgd2vkw4sxc'';
      };
      sprockets_2_2_2 = {
        basename = ''sprockets'';
        meta = {
  