anchor.diff:      owner = "couchbase";
       repo = "cbauth";
       sha256 = "185c10ab80cn4jxdp915h428lm0r9zf1cqrfsjs71im3w3ankvsn";
  +  };
  +
  +  ccache = buildFromGitHub {
  +    version = 2;
  +    rev = "v2.0.2";
  +    owner = "karlseguin";
  +    repo = "ccache";
  +    sha256 = "11zg85f5v89dfqy1s5xs42cs56sxdqs768l9wx73yksxqkidddbh";
     };
   
     certificate-transparency = buildFromGitHub {
  
positive.code:   };
  
    etcd_for_vault = buildFromGitHub {
      inherit (etcd) rev date owner repo sha256 version meta;
      subPackages = [
        "auth/authpb"
        "client"
  
negative.code:     version = 2;
      owner = "coreos";
      repo = "etcd";
      rev = "v3.1.6";
      sha256 = "12024ccvyln5v4b9xab3yd8hjgzbh576ky934k9kqx78mzqcmvsp";
      buildInputs = [
        bolt
        btree
        urfave_cli
        ccache
        clockwork
        cobra
        cmux
        crypto
        go-grpc-prometheus
        go-humanize
        go-semver
        go-systemd
        grpc
        grpc-gateway
        net
        pb_v1
        pflag
        pkg
        probing
        prometheus_client_golang
        protobuf
        gogo_protobuf
        pty
        speakeasy
        tablewriter
        time
  