anchor.diff:      version = 3;
       owner = "btcsuite";
       repo = "btcd";
  -    date = "2017-05-25";
  -    rev = "9918e2a56196fb6b1b2837a9e7fb84f3454098fd";
  -    sha256 = "0z5dpwylz1vnb2ncs4jz7rz672crxhv9gbqxd6a1qdllla13718g";
  +    date = "2017-05-30";
  +    rev = "3d0dfed40b879733f608af4a3e155b9086db5368";
  +    sha256 = "1n32ynl0bvs40vh7h9k1aafrg9mgjifgw9pkbh47xpwhwf7876s0";
       subPackages = [
         "btcec"
       ];
  
positive.code: 
    dns = buildFromGitHub {
      version = 3;
      rev = "0c23f842c83e407f164c4dedae10077fef3612fe";
      date = "2017-05-25";
      owner  = "miekg";
      repo   = "dns";
      sha256 = "0hkga2apnsp4mas9n0haspx42n3rnhv79zn3l04vwv43m2wvfdqh";
    };
  
    dnsimple-go = buildFromGitHub {
  
negative.code:     version = 3;
      owner = "garyburd";
      repo = "redigo";
      date = "2017-05-31";
      rev = "95d11dba2d44531bdb8022752b98912baafae03a";
      sha256 = "0i076qhnkpdwbananhbya5cg6d76xrn228y0dji2v81rmqv9x6f8";
      meta.useUnstable = true;
    };
  
  