{
  pkgs,
  lib,
  config,
  ...
}:
{
  name = "nixos-test-dynamicism-main";

  defaults = { ... }: { };

  #node.pkgsReadOnly = false;

  extraPythonPackages = p: [
    p.beartype
  ];

  nodes.machine = { pkgs, config, ... }: {
    imports = [ ./configuration.nix ];

    system.includeBuildDependencies = true;
    system.switch.enable = true;

    virtualisation.additionalPaths = [ config.system.build.toplevel ];
    virtualisation = {
      memorySize = 4096;
      cores = 4;
      writableStore = true;
      mountHostNixStore = true;
      installBootLoader = true;
    };

    environment.systemPackages = let
      configFileTree = pkgs.callPackage ./configuration-package.nix { };
    in [
      configFileTree
    ];
  };

  # What's a little IFD between friends?
  testScript = ./test-script.py
  |> builtins.readFile;
}