anchor.diff:  
     gcloud-golang = buildFromGitHub {
       version = 2;
  -    date = "2016-09-28";
  -    rev = "debdc0ca0113dd546ebebeb2000c9d938059f41d";
  +    date = "2016-09-30";
  +    rev = "90296fd601ebfc594192e722a022663b0c3f8756";
       owner = "GoogleCloudPlatform";
       repo = "gcloud-golang";
  -    sha256 = "1635f1gvjn22cb0z1jj175kjfv3mz6jnz49sgyrf15npsfqc72vc";
  +    sha256 = "1vb2ld2dl0yd3f9bjgqj99rbi3y74lfl08c0xi4h1l29mn0i4gy2";
       goPackagePath = "cloud.google.com/go";
       goPackageAliases = [
         "google.golang.org/cloud"
  
positive.code: 
    crypto = buildFromGitHub {
      version = 2;
      rev = "a20de3fa94e069ec699987416679230d72e030a3";
      date = "2016-09-23";
      owner    = "golang";
      repo     = "crypto";
      sha256 = "1i71i8a9xq9sq4m9i5la0kd3jyy0rxl2mc9ng09prbavj6m9v8n5";
      goPackagePath = "golang.org/x/crypto";
      goPackageAliases = [
        "code.google.com/p/go.crypto"
  
negative.code: 
    protobuf = buildFromGitHub {
      version = 2;
      rev = "df1d3ca07d2d07bba352d5b73c4313b4e2a6203e";
      date = "2016-09-27";
      owner = "golang";
      repo = "protobuf";
      sha256 = "02afl1gbq0dzph61jljw1mvjv647ghcr69b5mgw978jjwf0cxx6a";
      goPackagePath = "github.com/golang/protobuf";
      goPackageAliases = [
        "code.google.com/p/goprotobuf"
  