diff --git a/iso.nix b/iso.nix
new file mode 100644
index 0000000..578b161
--- /dev/null
+++ b/iso.nix
@@ -0,0 +1,12 @@
+# This module defines a small NixOS installation CD.  It does not
+# contain any graphical stuff.
+{ config, pkgs, ... }:
+{
+  imports = [
+    <nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix>
+
+    # Provide an initial copy of the NixOS channel so that the user
+    # doesn't need to run "nix-channel --update" first.
+    <nixpkgs/nixos/modules/installer/cd-dvd/channel.nix>
+  ];
+}