update test system config

systems/installer.nix

@@ -0,0 +1,32 @@
+
+{
+  config,
+  modulesPath,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [
+    (modulesPath + "/installer/cd-dvd/installation-cd-minimal.nix")
+  ];
+
+  networking.hostName = lib.mkForce "eh22-nixos-installer";
+  networking.wireless.enable = false;
+  system.installer.channel.enable = true;
+  environment.systemPackages = with pkgs; [
+    disko
+  ];
+
+  # configure our own user account in the installer
+  services.getty.autologinUser = lib.mkForce "noc";
+
+  # conflict resolutions
+  services.openssh.settings.PermitRootLogin = lib.mkForce "no";
+  boot.initrd.systemd.enable = lib.mkForce false;
+  boot.loader.grub.enable = lib.mkForce false;
+
+  # this is only okay because the installer does not have any persistence so no data can be in an old/incompatible format
+  system.stateVersion = config.system.nixos.release;
+  home-manager.users.noc.home.stateVersion = config.system.stateVersion;
+}