{
  perSystem =
    { pkgs, ... }:
    let
      sources = import ../../../npins;
      overlay =
        _: _:
        import "${sources.proxmox-nixos}/pkgs" {
          inherit pkgs;
          pkgs-unstable = pkgs;
          craneLib = pkgs.callPackage "${sources.crane}/lib" { };
        };
    in
    {
      checks.proxmox-basic = (pkgs.extend overlay).testers.runNixOSTest {
        imports = [
          ./proxmoxTest.nix
        ];
        _module.args = {
          inherit sources;
        };
      };
    };
}