anchor.diff:  
     vault = buildFromGitHub {
       version = 3;
  -    rev = "v0.7.1";
  +    rev = "v0.7.2";
       owner = "hashicorp";
       repo = "vault";
  -    sha256 = "040iaz325c383m2nwd41i2dv7977d2izg1f4vx73vhblhllsfy06";
  +    sha256 = "047w4hyk2njc2dfqj8gpq77xj3zh1pkmn1bbm372xrry5sh8sif6";
   
       nativeBuildInputs = [
         pkgs.protobuf-cpp
  
positive.code:   };
  
    influxdb = buildFromGitHub {
      version = 2;
      owner = "influxdata";
      repo = "influxdb";
      rev = "v1.2.3";
      sha256 = "14ng7c4xrxw897j1iwnl9jp9mn05kaiyzw8c4ww7f6x5la2g948b";
      propagatedBuildInputs = [
        bolt
        crypto
  
negative.code: 
    go-ethereum = buildFromGitHub {
      version = 3;
      date = "2017-05-08";
      rev = "d18b509e40c5d41a9ab25cd23c282b7502ff1f2a";
      owner  = "ethereum";
      repo   = "go-ethereum";
      sha256 = "1rmnfn6b2sfxigi00wm2h60brx537y2ysbizcmqxll0n08jgfir3";
      subPackages = [
        "crypto/sha3"
      ];
  