anchor.diff:  
     go-isatty = buildFromGitHub {
       version = 2;
  -    rev = "57fdcb988a5c543893cc61bce354a6e24ab70022";
  +    rev = "fc9e8d8ef48496124e79ae0df75490096eccf6fe";
       owner  = "mattn";
       repo   = "go-isatty";
  -    sha256 = "1ln0mmdibh3y129ar75x6q54wjp84b6qf4463dr3hlqwrilmkdpp";
  -    date = "2017-03-07";
  +    sha256 = "07c35zwb71msrjw43hmjrln55nzzdbgfghqq7mia374kb077wvf3";
  +    date = "2017-03-22";
       buildInputs = [
         sys
       ];
  
positive.code:       hashland
        murmur3
      ];
      date = "2017-03-17";
    };
  
    go-multipart-files = buildFromGitHub {
  
negative.code:     version = 2;
      owner = "pelletier";
      repo = "go-toml";
      rev = "f6e7596e8daafd44dc9e5c208dc73035020c8481";
      sha256 = "1zz5d36hijvxxpplm9j9rp8qqbc0vzfyhb8p02ydjyprv6c7h32h";
      propagatedBuildInputs = [
        go-buffruneio
      ];
      meta.useUnstable = true;
      date = "2017-03-23";
    };
  
    go-units = buildFromGitHub {
  