anchor.diff:  
     bbolt = buildFromGitHub {
       version = 6;
  -    rev = "7ee3ded59d4835e10f3e7d0f7603c42aa5e83820";
  +    rev = "63597a96ec0ad9e6d43c3fc81e809909e0237461";
       owner  = "coreos";
       repo   = "bbolt";
  -    sha256 = "7e12ed6c92840f957dc1f00f3f98570a8174a9a61ed2b0ffbc3c85139373ee7d";
  -    date = "2018-09-12";
  +    sha256 = "c6da761fa166cc72f710df0f722926186a835aa94e6d4cb26fc48963cb9a61f9";
  +    date = "2019-01-28";
       goPackagePath = "go.etcd.io/bbolt";
       goPackageAliases = [
         "github.com/coreos/bbolt"
  
positive.code:     version = 6;
      owner = "packethost";
      repo = "packngo";
      date = "2018-10-22";
      rev = "7fd7ae44ec9b0c8b511afc7088a5281557e6708d";
      sha256 = "5f48b747e4387a94f2c2a5e67401a8f6d978cc4fc2e035e4e3a63a6f03154fb1";
    };
  
    paho-mqtt-golang = buildFromGitHub {
      version = 6;
      owner = "eclipse";
      repo = "paho.mqtt.golang";
      rev = "c95f2f508baf22ddc8625d0097b1ceb8abc508b3";
      sha256 = "84141af13843f04e51518c2cb4241db185e0e7216e46bb3dafef46f819efe001";
      propagatedBuildInputs = [
        net
      ];
      date = "2018-10-11";
    };
  
    parse = buildFromGitHub {
      version = 6;
      owner = "tdewolff";
      repo = "parse";
      rev = "v2.3.3";
      sha256 = "1zfbxxprld4mwddmxy9a1k87pvdxhws8zb9if4bw6z4nba9x25zi";
    };
  
    pat = buildFromGitHub {
  
negative.code: 
    service = buildFromGitHub {
      version = 6;
      rev = "4c239ee84e7bb93441b1b6a3f2db62d40e0e6cbd";
      owner  = "kardianos";
      repo   = "service";
      sha256 = "5gg15BiBNX8cTHlZqIOhncnH8gZifIfxFQm0NWYlPxY=";
      date = "2018-11-15";
      propagatedBuildInputs = [
        osext
        sys
  