anchor.diff:  
     go-dockerclient = buildFromGitHub {
       version = 2;
  -    date = "2017-01-20";
  -    rev = "53f04ab33b89eef256c320c36435a10b672d473d";
  +    date = "2017-01-26";
  +    rev = "41e28db8e0cd3d55b80c9c71094093de7406f3c2";
       owner = "fsouza";
       repo = "go-dockerclient";
  -    sha256 = "1da80a4h7wl9s4byr51nbls8b51xkm72dhvm2fgfldiv0bazygqp";
  +    sha256 = "09ncvmsyix9b09xh9ql5szm67hjmagmyc1qbspmqnv1qahgki59x";
       propagatedBuildInputs = [
         docker_for_go-dockerclient
         go-cleanhttp
  
positive.code: 
    dns = buildFromGitHub {
      version = 2;
      rev = "ca336a1f95a6b89be9c250df26c7a41742eb4a6f";
      date = "2017-01-04";
      owner  = "miekg";
      repo   = "dns";
      sha256 = "1qwvd02657kkb2w4zksryxziy18lvh7mjmgash3ph2bn353iqaxk";
    };
  
    weppos-dnsimple-go = buildFromGitHub {
  
negative.code:     sha256 = "0m7q1bccdjgijhrq056rs8brizrvsiyr8k0iphprs8wmlr0hz5vi";
    };
  
    gotty = buildFromGitHub {
      version = 2;
      rev = "cd527374f1e5bff4938207604a14f2e38a9cf512";
      date = "2012-06-04";
      owner = "Nvveen";
      repo = "Gotty";
      sha256 = "16slr2a0mzv2bi90s5pzmb6is6h2dagfr477y7g1s89ag1dcayp8";
    };
  
    goutils = buildFromGitHub {
      version = 1;
      rev = "5823a0cbaaa9008406021dc5daf80125ea30bba6";
  