anchor.diff:      owner = "pkg";
       repo = "sftp";
       rev = "1.0.0";
  -    sha256 = "0bb1v0kv414bxlanp2kzsifydi90ab0lscrd8651psvsqagjkafj";
  +    sha256 = "6db3e8721d5062e30bca1ddabd6f7aa4d30a44562d9f2428cff6d7a6a6c7a6d0";
       propagatedBuildInputs = [
         crypto
         errors
  
positive.code: 
    dbus = buildFromGitHub {
      version = 3;
      rev = "bd29ed602e2cf4207ebcabcd530259169e4289ba";
      owner = "godbus";
      repo = "dbus";
      sha256 = "07ms9vg7pay4jbhjcavapfjsvxid0968m97fl24qwvcl2znmv089";
      date = "2017-07-07";
    };
  
    decimal = buildFromGitHub {
  
negative.code:       inherit
          goPackagePath
          rev;
        date = "2017-08-21";
      };
      rev = "dd6bdadc5852eae2d133075a3690d6ad744add48";
      goPackagePath = "google.golang.org/api";
      src = fetchzip {
        version = 3;
  