anchor.diff:      version = 2;
       owner = "rfjakob";
       repo = "eme";
  -    rev = "601d0e278ceda9aa2085a61c9265f6e690ef5255";
  -    date = "2016-07-27";
  -    sha256 = "f3497a95d1638bfe22afc275e308a51626ca206a69675b6d5d48ca81297d0ebf";
  +    rev = "fd00240838d2e0fe6b2c58bf5b27db843d828ad5";
  +    date = "2017-02-05";
  +    sha256 = "1zykkxsc6606iwrsnvr7kvz8f44snspm35ym2d0cyx45kvbd5195";
       meta.useUnstable = true;
     };
   
  
positive.code: 
    net = buildFromGitHub {
      version = 2;
      rev = "a689eb3bc4b53af70390acc3cf68c9f549b6b8d6";
      date = "2017-01-21";
      owner  = "golang";
      repo   = "net";
      sha256 = "0cdhpriv852002zv96nf6g4xffyskmpy4jfkbrha6fy4aydk3j0a";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "github.com/hashicorp/go.net"
  
negative.code:       testify
      ];
      meta.useUnstable = true;
      date = "2017-02-09";
    };
  
    cupcake_rdb = buildFromGitHub {
  