Setting options for ProxMox build

Help
1

I am trying to build an image for ProxMox following instructions here. According this wiki page you can configure proxmox specifc options. I am trying with this configuration.nix:

{
  config,
  lib,
  pkgs,
  ...
}: {
  system.stateVersion = "23.11";
  services.sshd.enable = true;
  services.openssh.settings.PermitRootLogin = lib.mkDefault "yes";
 
  users.users.root.password = "nixos";
  
  proxmox.memory = 4096;
  proxmox.cores = 2;
  proxmox.diskSize = "10G";

}

But if I run nixos-generate -f proxmox -c configuration.nix I get error

The option `proxmox.cores' does not exist.

I do not understand how do I have to specify proxmox specifc options which are among the options of the module, as mentioned in the wiki page.

2

Did you ever figure this out? I’m struggling with it at the moment as I’m trying to learn it, but it’s currently beyond me.

I want to set the number of cores, memory, efi boot, etc.