anchor.diff:      owner = "cihub";
       repo = "seelog";
       sha256 = "1f0rwgqlffv1a7b05736a4gf4l9dn80wsfyqcnz6qd2skhwnzv29";
  +  };
  +
  +  segment = buildFromGitHub {
  +    rev    = "db70c57796cc8c310613541dfade3dce627d09c7";
  +    date   = "2016-01-05";
  +    owner  = "blevesearch";
  +    repo   = "segment";
  +    sha256 = "09xfdlcc6bsrr5grxp6fgnw9p4cf6jc0wwa9049fd1l0zmhj2m1g";
     };
   
     semver = buildFromGitHub {
  
positive.code:     ];
    };
  
    binarydist = buildFromGitHub {
      rev    = "9955b0ab8708602d411341e55fffd7e0700f86bd";
      owner  = "kr";
      repo   = "binarydist";
      sha256 = "11wncbbbrdcxl5ff3h6w8vqfg4bxsf8709mh6vda0cv236flkyn3";
    };
  
    blackfriday = buildFromGitHub {
  
negative.code:     owner  = "mreiferson";
      repo   = "go-options";
      sha256 = "0ksyi2cb4k6r2fxamljg42qbz5hdcb9kv5i7y6cx4ajjy0xznwgm";
    };
  
    go-porterstemmer = buildFromGitHub {
      rev    = "23a2c8e5cf1f380f27722c6d2ae8896431dc7d0e";
      date   = "2014-12-30";
      owner  = "blevesearch";
      repo   = "go-porterstemmer";
      sha256 = "0rcfbrad79xd114h3dhy5d3zs3b5bcgqwm3h5ih1lk69zr9wi91d";
    };
  
    go-querystring = buildFromGitHub {
  