diff --git a/packages/configuration.nix b/packages/configuration.nix
new file mode 100644
index 0000000..2b995aa
--- /dev/null
+++ b/packages/configuration.nix
@@ -0,0 +1,19 @@
+# A NixOS container to protect against accidental fork bombs
+#
+# Put this in /var/lib/containers/test/etc/nixos/configuration.nix
+# See https://nixos.org/wiki/NixOS:Containers
+
+environment.systemPackages = with pkgs; [
+  busybox
+  bash dash mksh zsh
+];
+
+users.extraUsers.user = {
+  name = "tlevine";
+  group = "users";
+  uid = 1000;
+  createHome = true;
+  home = "/home/tlevine";
+  extraGroups = [ "users" "wheel" ];
+  isNormalUser = true;
+};