anchor.diff:      galera_01 =
         { pkgs, ... }:
         {
  +      imports = [ users ];
         networking = {
           interfaces.eth1 = {
             ipv4.addresses = [
  
positive.code: let
    mysqlenv-common      = pkgs.buildEnv { name = "mysql-path-env-common";      pathsToLink = [ "/bin" ]; paths = with pkgs; [ bash gawk gnutar inetutils which ]; };
    mysqlenv-mariabackup = pkgs.buildEnv { name = "mysql-path-env-mariabackup"; pathsToLink = [ "/bin" ]; paths = with pkgs; [ gzip iproute2 netcat procps pv socat ]; };
  
  in {
    name = "mariadb-galera-mariabackup";
  
negative.code:         firewall.allowedTCPPorts = [ 3306 4444 4567 4568 ];
          firewall.allowedUDPPorts = [ 4567 ];
        };
        systemd.services.mysql = with pkgs; {
          path = [ mysqlenv-common mysqlenv-mariabackup ];
        };
  