anchor.diff:  
     goterm = buildFromGitHub {
       version = 3;
  -    rev = "d443b9114f9c050367638a536310fbec36a0de11";
  -    date = "2017-09-18";
  +    rev = "cd42d22448895aa0e4149be43b71801180ca7218";
  +    date = "2017-11-10";
       owner = "buger";
       repo = "goterm";
  -    sha256 = "1f8ii092bp3lafkdxl0dwpjyhynqymhi9rdcji71z136dqc90g05";
  +    sha256 = "0i6295nlj4wl7ga2andx26xy86764qa578p8jcqdz0xak4ixz9jf";
     };
   
     gotty = buildFromGitHub {
  
positive.code: 
    gziphandler = buildFromGitHub {
      version = 3;
      date = "2017-09-16";
      rev = "97ae7fbaf81620fe97840685304a78a306a39c64";
      owner = "NYTimes";
      repo = "gziphandler";
      sha256 = "0pwiajp6dc8kvv48fn33r7ysh13c8daaiawqxl1i99zmscfjc1i2";
    };
  
    hashland = buildFromGitHub {
  
negative.code: 
    gophercloud = buildFromGitHub {
      version = 3;
      rev = "2e3f94408098821208798903a8cd3736a8fa2325";
      owner = "gophercloud";
      repo = "gophercloud";
      sha256 = "025nvwj0jcfyjzcfc5pw078k2k581faa4naq199c4p0z5wxdx0dp";
      date = "2017-11-10";
      excludedPackages = "test";
      propagatedBuildInputs = [
        crypto
  