anchor.diff:  
     # Enable the OpenSSH daemon.
     services.openssh.enable = true;
  +
  +  # Enable vmware guest
  +  virtualisation.vmware.guest.enable = true;
   
     # Open ports in the firewall.
     # networking.firewall.allowedTCPPorts = [ ... ];
  
positive.code:   # List packages installed in system profile. To search, run:
    # $ nix search wget
     environment.systemPackages = with pkgs; [
       wget vim git zsh curl
     ];
  
    # Some programs need SUID wrappers, can be configured further or are
  
negative.code:   # services.xserver.desktopManager.plasma5.enable = true;
  
    # Define a user account. Don't forget to set a password with ‘passwd’.
    programs.zsh.enable = true; 
    users.users.loki = {
      isNormalUser = true;
      shell = pkgs.zsh;
      extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
    };
    security.sudo.enable = true;
    security.sudo.extraConfig = ''
      %wheel ALL=(root) NOPASSWD: ALL
    '';
  
    # This value determines the NixOS release from which the default
    # settings for stateful data, like file locations and database versions
  