anchor.diff:  
     ugorji_go = buildFromGitHub {
       version = 5;
  -    date = "2017-12-14";
  -    rev = "0e0d6e869525973a9b36093f6ddc9d91b9fc2d71";
  +    date = "2017-12-31";
  +    rev = "ccfe18359b55b97855cee1d3f74e5efbda4869dc";
       owner = "ugorji";
       repo = "go";
  -    sha256 = "0hqhb7zdgdld9xh9bkalycwpkw36k39q8qnhar20zap5s2wd1ynj";
  +    sha256 = "1zjyrc1243kpqbwaqxrz7la34553qmk3bpcamxdp4q83hp62c9sv";
       goPackageAliases = [
         "github.com/hashicorp/go-msgpack"
       ];
  
positive.code:   };
  
    lxd = buildFromGitHub {
      version = 3;
      rev = "lxd-2.20";
      owner  = "lxc";
      repo   = "lxd";
      sha256 = "0icffdkc3d7ynap6i2r8cg91bc3iga1c7llv8k95x2w69mmhi0jh";
      excludedPackages = "\\(test\\|benchmark\\)"; # Don't build the binary called test which causes conflicts
      buildInputs = [
        pkgs.acl
  
negative.code:   };
  
    go-md2man = buildFromGitHub {
      version = 5;
      owner = "cpuguy83";
      repo = "go-md2man";
      rev = "8d868be6e9bf9d5350910bab97a050e49887600f";
      sha256 = "129zdw0v2azj4bhs25ciz3pf4z2p3kv1mcbhd4vrprjwvh385072";
      propagatedBuildInputs = [
        blackfriday
      ];
      meta.useUnstable = true;
      date = "2017-12-23";
    };
  
    go-memdb = buildFromGitHub {
  