anchor.diff:    };
   
     structs = buildFromGitHub {
  -    date = "2016-02-24";
  -    rev = "12ff68a6f48a1c8bd118316171545683337655df";
  +    date = "2016-03-14";
  +    rev = "ff332a1b029d57daa56b9a7a7ec95f4e5f0f7d0e";
       owner  = "fatih";
       repo   = "structs";
  -    sha256 = "1ccql559467m8sis8wj0y6mbcsr6b9y9hmzglsh72fs0hr536m9l";
  +    sha256 = "1pl26j41m5zxckwyj373s2wr8rrc6d9gih39s71z1hbbixa7znag";
     };
   
     stump = buildFromGitHub {
  
positive.code:   };
  
    ugorji_go = buildFromGitHub {
      date = "2016-02-25";
      rev = "187fa0f8af224437e08ecb3f208c4d1a94859a61";
      owner = "ugorji";
      repo = "go";
      sha256 = "000a3vx2c0rsamd3rvv1a4analyfvbbpbm9fi48yj0bgb1m53h3r";
      goPackageAliases = [ "github.com/hashicorp/go-msgpack" ];
    };
  
  
negative.code:   };
  
    mysql = buildFromGitHub {
      rev = "66312f7fe2678aa0f5ec770f96702f4c4ec5aa8e";
      owner  = "go-sql-driver";
      repo   = "mysql";
      sha256 = "1g89miq1c9zpazn2xraqnssqxin9j7wkjy3bffd6k9725g02d6q2";
    };
  
    net-rpc-msgpackrpc = buildFromGitHub {
  