anchor.diff:    };
   
     mathutil = buildFromGitHub {
  -    date = "2015-06-05";
  -    rev = "a804f0f2d8521e22d6adabf02cbec61dc1f9dbd2";
  +    date = "2016-01-19";
  +    rev = "38a5fe05cd94d69433fd1c928417834c604f281d";
       owner = "cznic";
       repo = "mathutil";
  -    sha256 = "1d8ms51gmp76qavbbrs384l0a5fmq8cn4wxwbx2pbs5hckzmpjkv";
  +    sha256 = "1w9ypzdmz2c94v5jpz6g80npl48kvvzlqcnccn1y6hgnisqinvbc";
       buildInputs = [ bigfft ];
     };
   
  
positive.code:     repo = "go";
      sha256 = "0njncpdbh115l5mxyks08jh91kdmy0mvbmxj9mr1psv5k97gf0pn";
      goPackageAliases = [ "github.com/hashicorp/go-msgpack" ];
    };
  
    goamz = buildGoPackage rec {
  
negative.code:     owner  = "peterh";
      repo   = "liner";
      sha256 = "05ihxpmp6x3hw71xzvjdgxnyvyx2s4lf23xqnfjj16s4j4qidc48";
    };
  
    odeke-em.log = buildFromGitHub {
  