anchor.diff:      buildInputs =
         (self.nativeDeps."bower" or []);
       deps = [
  -      self.by-version."abbrev"."1.0.4"
  +      self.by-version."abbrev"."1.0.5"
         self.by-version."archy"."0.0.2"
         self.by-version."bower-config"."0.5.0"
         self.by-version."bower-endpoint-parser"."0.2.1"
  
positive.code:       self.by-version."timers-browserify"."1.0.1"
        self.by-version."tty-browserify"."0.0.0"
        self.by-version."umd"."2.0.0"
        self.by-version."url"."0.7.9"
        self.by-version."util"."0.10.3"
        self.by-version."vm-browserify"."0.0.4"
      ];
  
negative.code:   by-spec."extend"."~1.2.1" =
      self.by-version."extend"."1.2.1";
    by-spec."extname"."^0.1.1" =
      self.by-version."extname"."0.1.2";
    by-version."extname"."0.1.2" = lib.makeOverridable self.buildNodePackage {
      name = "extname-0.1.2";
      src = [
        (fetchurl {
          url = "http://registry.npmjs.org/extname/-/extname-0.1.2.tgz";
          name = "extname-0.1.2.tgz";
          sha1 = "de821aa0f01449d4b4043d4aeefa89a456bf3239";
        })
      ];
      buildInputs =
        (self.nativeDeps."extname" or []);
      deps = [
        self.by-version."ext-list"."0.1.0"
        self.by-version."map-key"."0.1.1"
        self.by-version."underscore.string"."2.3.3"
      ];
      peerDependencies = [
      ];
  