anchor.diff:    jwt-go = buildFromGitHub {
       owner = "dgrijalva";
       repo = "jwt-go";
  -    rev = "v2.7.0";
  -    sha256 = "2af35dbb8eace9e84faf6d6f7c6aab6776492b002e5c9587513c5d1d5f8e8ab3";
  +    rev = "v3.0.0";
  +    sha256 = "0gmxycray168ppybd3g9ic9dvkvlnl1y7rn00gcycsv23phszprz";
     };
   
     kingpin-v2 = buildFromGitHub {
  -    rev = "v2.1.11";
  +    rev = "v2.2.0";
       owner = "alecthomas";
       repo = "kingpin";
       goPackagePath = "gopkg.in/alecthomas/kingpin.v2";
  -    sha256 = "0s3xz1pwqdfk466nk2qj1r5p1n9qh6y7ndik44yq56i5k3lxb9qg";
  +    sha256 = "1cx9zvqk7g62ndwig8450jrjdk00hkzl8jml6m253h7vwfn4qavw";
       propagatedBuildInputs = [
         template
         units
  
positive.code:   };
  
    go-flags = buildFromGitHub {
      date = "2016-05-28";
      rev = "b9b882a3990882b05e02765f5df2cd3ad02874ee";
      owner  = "jessevdk";
      repo   = "go-flags";
      sha256 = "02wzy17cl9v91ssmidqgvsk82dgg0iskd12h8dkp1ya1f9cvn7rj";
    };
  
    go-getter = buildFromGitHub {
  
negative.code:   };
  
    gcloud-golang = buildFromGitHub {
      rev = "abc55035ece67841a0419d4b66017317a232015d";
      owner = "GoogleCloudPlatform";
      repo = "gcloud-golang";
      sha256 = "1cylwnp792ihbi6l4f4rnamnw0yqk8jw23l4bakdp0l5a3qjbkzz";
      goPackagePath = "google.golang.org/cloud";
      propagatedBuildInputs = [
        net
  