anchor.diff:  
     lxd = buildFromGitHub {
       version = 3;
  -    rev = "lxd-2.19";
  +    rev = "lxd-2.20";
       owner  = "lxc";
       repo   = "lxd";
  -    sha256 = "0h2qhmpzwbdihwnbxdbpysi4yzaklpv8ax638cfxk6g4azdd3535";
  +    sha256 = "0icffdkc3d7ynap6i2r8cg91bc3iga1c7llv8k95x2w69mmhi0jh";
       excludedPackages = "\\(test\\|benchmark\\)"; # Don't build the binary called test which causes conflicts
       buildInputs = [
         pkgs.acl
  
positive.code: 
    cgofuse = buildFromGitHub {
      version = 3;
      rev = "v1.0.3";
      owner  = "billziss-gh";
      repo   = "cgofuse";
      sha256 = "1gca476kw154891vmyclyvkz7x9mj6anklvm0i0vi651kv5lahzf";
      buildInputs = [
        pkgs.fuse_2
      ];
  
negative.code:       seed
      ];
      meta.useUnstable = true;
      date = "2017-11-17";
    };
  
    memcache = buildFromGitHub {
  