anchor.diff:        requiredGems = [  ];
         sha256 = ''0i4pmx86xbnlrhbbm9znnyfglmb21vwjvh262c6qw3m19w6ifs6p'';
       };
  -    multi_json_1_0_3 = {
  +    multi_json_1_0_4 = {
         basename = ''multi_json'';
         meta = {
           description = ''A gem to provide swappable JSON backends.'';
           homepage = ''http://github.com/intridea/multi_json'';
           longDescription = ''A gem to provide swappable JSON backends utilizing Yajl::Ruby, the JSON gem, JSON pure, or a vendored version of okjson.'';
         };
  -      name = ''multi_json-1.0.3'';
  -      requiredGems = [  ];
  -      sha256 = ''12c7h38x1cmgl265n4397zx3ag8szkrq1q4lw7pp6fkqd532n9xb'';
  +      name = ''multi_json-1.0.4'';
  +      requiredGems = [  ];
  +      sha256 = ''0f2yrlxcdhdskkm4q11p2didwl26wikxycysb7i49ndp94rklvcr'';
       };
       nix_0_1_1 = {
         basename = ''nix'';
  
positive.code:     railties = g.railties_3_1_3;
      rake = g.rake_0_9_2_2;
      rdoc = g.rdoc_3_11;
      sprockets = g.sprockets_2_0_3;
      thor = g.thor_0_14_6;
      tilt = g.tilt_1_3_3;
      treetop = g.treetop_1_4_10;
      tzinfo = g.tzinfo_0_3_31;
    };
    gem_nix_args = [ ''nix'' ''rails'' ''rake'' ];
    gems = {
      actionmailer_3_1_3 = {
        basename = ''actionmailer'';
  
negative.code:     erubis = g.erubis_2_7_0;
      hike = g.hike_1_2_1;
      i18n = g.i18n_0_6_0;
      json = g.json_1_6_3;
      mail = g.mail_2_3_0;
      mime_types = g.mime_types_1_17_2;
      multi_json = g.multi_json_1_0_4;
      nix = g.nix_0_1_1;
      polyglot = g.polyglot_0_3_3;
      rack = g.rack_1_3_5;
  