anchor.diff:      version = 2;
       owner = "pkg";
       repo = "sftp";
  -    rev = "8197a2e580736b78d704be0fc47b2324c0591a32";
  -    date = "2016-09-08";
  -    sha256 = "11jdqi93ivpp6mr4bxdis20jnjpqf8b2kvn1gd7917n8i9bjdlxj";
  +    rev = "4d0e916071f68db74f8a73926335f809396d6b42";
  +    date = "2016-10-01";
  +    sha256 = "0bkhab0byjdjq476hxi3as685p7x18l2np7gj2kmrzpadadv1w0a";
       propagatedBuildInputs = [
         crypto
         errors
  
positive.code:     version = 2;
      owner = "pkg";
      repo = "errors";
      rev = "v0.7.1";
      sha256 = "0gcdd3h26g4hbmx648c40vk17y422rdpkfchg0rghnbicx3492kg";
    };
  
    errwrap = buildFromGitHub {
  
negative.code:   };
  
    mitchellh_cli = buildFromGitHub {
      version = 2;
      date = "2016-10-03";
      rev = "3acdca71948da01ac07e382e696e4798f0215ccc";
      owner = "mitchellh";
      repo = "cli";
      sha256 = "08wf9j2lgkx7i2x04viz0ws75chzx31h4hjwv38bqs2lbbxa59gi";
      propagatedBuildInputs = [ crypto go-radix speakeasy go-isatty ];
    };
  
  