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-<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-importing-modules">
-  <title>Importing Modules</title>
-  <para>
-    Sometimes NixOS modules need to be used in configuration but exist
-    outside of Nixpkgs. These modules can be imported:
-  </para>
-  <programlisting language="nix">
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ # Use a locally-available module definition in
-      # ./example-module/default.nix
-        ./example-module
-    ];
-
-  services.exampleModule.enable = true;
-}
-</programlisting>
-  <para>
-    The environment variable <literal>NIXOS_EXTRA_MODULE_PATH</literal>
-    is an absolute path to a NixOS module that is included alongside the
-    Nixpkgs NixOS modules. Like any NixOS module, this module can import
-    additional modules:
-  </para>
-  <programlisting language="nix">
-# ./module-list/default.nix
-[
-  ./example-module1
-  ./example-module2
-]
-</programlisting>
-  <programlisting language="nix">
-# ./extra-module/default.nix
-{ imports = import ./module-list.nix; }
-</programlisting>
-  <programlisting language="nix">
-# NIXOS_EXTRA_MODULE_PATH=/absolute/path/to/extra-module
-{ config, lib, pkgs, ... }:
-
-{
-  # No `imports` needed
-
-  services.exampleModule1.enable = true;
-}
-</programlisting>
-</section>