anchor.diff:  
     genproto = buildFromGitHub {
       version = 2;
  -    date = "2016-12-16";
  -    rev = "b3e7c2fb04031add52c4817f53f43757ccbf9c18";
  +    date = "2017-02-14";
  +    rev = "dee11a626cb8e7ff045ac9413dcd8a92e72f5863";
       owner  = "google";
       repo   = "go-genproto";
       goPackagePath = "google.golang.org/genproto";
  -    sha256 = "0b5lazz720bx1yfk3zkq1rh2bznfcwksd4dxng5x4dbkfj9lbsyr";
  +    sha256 = "1zfbwqizh9asvq6qbhpbjpn2jsfx8kf04pc3g67qzb3ff0hilv05";
       propagatedBuildInputs = [
         grpc
         net
  
positive.code: 
    gojsonschema = buildFromGitHub {
      version = 2;
      rev = "f06f290571ce81ab347174c6f7ad2e1865af41a7";
      owner  = "xeipuuv";
      repo   = "gojsonschema";
      sha256 = "1c1rdiyz2liynjffavhm0zah2488qcc34hdv5rlmygsqxyq0wxzj";
      date = "2016-12-31";
      propagatedBuildInputs = [ gojsonreference ];
    };
  
  
negative.code: 
    go-dockerclient = buildFromGitHub {
      version = 2;
      date = "2017-02-15";
      rev = "50724541fde5c77c754caf1d65d3c57e3e91883b";
      owner = "fsouza";
      repo = "go-dockerclient";
      sha256 = "12avb3l550hjgh9sw0br9s84qd6ij3x48s2x8acvgz3plm2bsd9k";
      propagatedBuildInputs = [
        docker_for_go-dockerclient
        go-cleanhttp
  