anchor.diff:  import ./make-test-python.nix ({ pkgs, ... }: {
     name = "caddy";
     meta = with pkgs.stdenv.lib.maintainers; {
  -    maintainers = [ xfix ];
  +    maintainers = [ xfix filalex77 ];
     };
   
     nodes = {
  
positive.code:       services.caddy.enable = true;
        services.caddy.config = ''
          http://localhost {
            gzip
  
            root ${
              pkgs.runCommand "testdir" {} ''
                mkdir "$out"
                echo hello world > "$out/example.html"
  
negative.code:       specialisation.etag.configuration = {
          services.caddy.config = lib.mkForce ''
            http://localhost {
              encode gzip
  
              root * ${
                pkgs.runCommand "testdir2" {} ''
                  mkdir "$out"
                  echo changed > "$out/example.html"
  