anchor.diff:  
     docker = buildFromGitHub {
       version = 2;
  -    rev = "f6b7dc983782e5800bdfd901f963494df9fbb0b7";
  +    rev = "833f1f44245c9e9514b931b19831ee58594f6b10";
       owner = "docker";
       repo = "docker";
  -    sha256 = "1vrpj2vn6s5m3kb3b68h9jyhi8vlnsip7f6lbs96jwwz6k2fpcj6";
  +    sha256 = "1f95cjvs660bpnad6v5ncbq6lyxvmc3k4m9drm3msyx3xf35bgc5";
       meta.useUnstable = true;
  -    date = "2017-04-04";
  +    date = "2017-04-05";
       propagatedBuildInputs = [
         distribution_for_docker
         errors
  
positive.code:       columnize
        copystructure
        dns
        go-bindata-assetfs
        go-checkpoint
        go-dockerclient
  
negative.code:       pkgs.libpcap
      ];
      meta.useUnstable = true;
      date = "2017-04-05";
    };
  
    etcd_client = buildFromGitHub {
  