anchor.diff:  
     prometheus_client_golang = buildFromGitHub {
       version = 2;
  -    rev = "08fd2e12372a66e68e30523c7642e0cbc3e4fbde";
  +    rev = "d01fd6222241828327e3507d64c90f796673bad0";
       owner = "prometheus";
       repo = "client_golang";
  -    sha256 = "1c4wzh5f7ckqcfr8hcc19pchz4j93nl8mgsgzjffqj6ghdqhs17f";
  +    sha256 = "1z21p2by5g8l4fgzys0xvgb6qcsphjvvz0bpl8sgwv5hf2pyd47m";
       propagatedBuildInputs = [
         goautoneg
         net
  
positive.code: 
    zap = buildFromGitHub {
      version = 2;
      rev = "v1.2.0";
      owner  = "uber-go";
      repo   = "zap";
      sha256 = "0k5cglzm907mr87ppzq9ppi1a5f34fssbggfwhlvvlxsnqqlivcf";
      goPackagePath = "go.uber.org/zap";
      goPackageAliases = [
        "github.com/uber-go/zap"
  
negative.code:     version = 2;
      owner = "minio";
      repo = "sha256-simd";
      date = "2017-04-24";
      rev = "f3ec2e4d36d43c3a899ed4b7d9f62188edcf5afd";
      sha256 = "1h446sfh2j000n7sz8qfv7q4jrvcmw0kdl0ibflwi6hy77ni1x9m";
    };
  
    skyring-common = buildFromGitHub {
  