anchor.diff:        sources."stealthy-require-1.1.1"
         sources."string_decoder-1.1.1"
         sources."supports-color-4.2.0"
  -      (sources."tar-4.4.10" // {
  -        dependencies = [
  -          sources."yallist-3.0.3"
  +      (sources."tar-4.4.13" // {
  +        dependencies = [
  +          sources."yallist-3.1.1"
           ];
         })
         (sources."temp-0.8.3" // {
  
positive.code:         sha1 = "ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59";
        };
      };
      "end-of-stream-1.4.1" = {
        name = "end-of-stream";
        packageName = "end-of-stream";
        version = "1.4.1";
        src = fetchurl {
          url = "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz";
          sha512 = "1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==";
        };
      };
      "es-abstract-1.14.2" = {
        name = "es-abstract";
        packageName = "es-abstract";
        version = "1.14.2";
        src = fetchurl {
          url = "https://registry.npmjs.org/es-abstract/-/es-abstract-1.14.2.tgz";
          sha512 = "DgoQmbpFNOofkjJtKwr87Ma5EW4Dc8fWhD0R+ndq7Oc456ivUfGOOP6oAZTTKl5/CcNMP+EN+e3/iUzgE0veZg==";
        };
      };
      "es-to-primitive-1.2.0" = {
  
negative.code:           sources."fsevents-1.2.9"
          ];
        })
        sources."chownr-1.1.3"
        (sources."class-utils-0.3.6" // {
          dependencies = [
            sources."define-property-0.2.5"
  