anchor.diff:        { name = "rimraf"; spec = "~2"; }
         { name = "retry"; spec = "0.6.0"; }
         { name = "couch-login"; spec = "~0.1.18"; }
  -      { name = "npmlog"; spec = ""; }
  +      { name = "npmlog"; spec = "*"; }
       ];
       peerDependencies = [
       ];
  
positive.code:       { name = "rimraf"; spec = "~2"; }
        { name = "retry"; spec = "0.6.0"; }
        { name = "couch-login"; spec = "~0.1.15"; }
        { name = "npmlog"; spec = ""; }
      ];
      peerDependencies = [
      ];
  
negative.code:     tarball = "http://registry.npmjs.org/npm-user-validate/-/npm-user-validate-0.0.3.tgz";
    };
    "npm2nix"."*" = {
      version = "4.0.1";
      dependencies = [
        { name = "semver"; spec = ">=2.0.10 <3.0.0"; }
        { name = "argparse"; spec = "0.1.15"; }
  