anchor.diff:        { pkgs, ... }:
   
         {
  +        imports = [ users ];
  +
           # prevent oom:
           # Kernel panic - not syncing: Out of memory: compulsory panic_on_oom is enabled
           virtualisation.memorySize = 1024;
   
  -        users.users.testuser = { isSystemUser = true; };
  -        users.users.testuser2 = { isSystemUser = true; };
           services.mysql.enable = true;
           services.mysql.initialDatabases = [
             { name = "testdb3"; schema = ./testdb.sql; }
  
positive.code:       { pkgs, ... }:
  
        {
          users.users.testuser = { isSystemUser = true; };
          users.users.testuser2 = { isSystemUser = true; };
          services.mysql.enable = true;
          services.mysql.initialScript = pkgs.writeText "mariadb-init.sql" ''
            ALTER USER root@localhost IDENTIFIED WITH unix_socket;
  
negative.code: import ./../make-test-python.nix ({ pkgs, ...}:
  
  
  let
    # Setup common users
    users = { ... }:
    {
      users.groups.testusers = { };
  
      users.users.testuser = {
        isSystemUser = true;
        group = "testusers";
      };
  
      users.users.testuser2 = {
        isSystemUser = true;
        group = "testusers";
      };
    };
  
  in
  
  {
    name = "mysql";
    meta = with pkgs.lib.maintainers; {
      maintainers = [ eelco shlevy ];
  