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