anchor.diff:      galera_03 =
         { pkgs, ... }:
         {
  +      imports = [ users ];
         networking = {
           interfaces.eth1 = {
             ipv4.addresses = [
  
positive.code:         firewall.allowedTCPPorts = [ 3306 4444 4567 4568 ];
          firewall.allowedUDPPorts = [ 4567 ];
        };
        users.users.testuser = { isSystemUser = true; };
        systemd.services.mysql = with pkgs; {
          path = [ mysqlenv-common mysqlenv-mariabackup ];
        };
  
negative.code:     galera_02 =
        { pkgs, ... }:
        {
        imports = [ users ];
        networking = {
          interfaces.eth1 = {
            ipv4.addresses = [
  