anchor.diff:  
     go-mssqldb = buildFromGitHub {
       version = 2;
  -    rev = "3c8af823c61814f2604a9dd74217841178e6643d";
  +    rev = "8d98b832104e41e4eaec92832862bb73b1af3844";
       owner = "denisenkom";
       repo = "go-mssqldb";
  -    sha256 = "0j0id4krv0zg48g8xlla1139wc1ljyvxsbiy03srhx6zw3q8bkrg";
  -    date = "2016-11-24";
  +    sha256 = "0a5cy82yjcnzvd80kv11a2ka711apa3pvk5r5snbijjhkr385pcg";
  +    date = "2016-11-27";
       buildInputs = [ crypto ];
     };
   
  
positive.code: 
    prometheus = buildFromGitHub {
      version = 2;
      rev = "v1.4.0";
      owner  = "prometheus";
      repo   = "prometheus";
      sha256 = "0m1m95ykq012rrx7ix7wvq83fcfghj4w8508cgcd3gl7hw6rrh85";
      buildInputs = [
        aws-sdk-go
        azure-sdk-for-go
  
negative.code:     version = 2;
      owner = "streadway";
      repo = "amqp";
      rev = "1b8853833a94be8ba57fd121a8651f7221e5b051";
      date = "2016-11-28";
      sha256 = "17jjxvhpf0hszmr9m5l72rp143wlb365gq3cqras5r2r5c6jx62i";
    };
  
    ansi = buildFromGitHub {
  