diff --git a/modules/config/gnu.nix b/modules/config/gnu.nix
new file mode 100644
index 00000000000..43fcf71977d
--- /dev/null
+++ b/modules/config/gnu.nix
@@ -0,0 +1,47 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+{
+  options = {
+    gnu = mkOption {
+      default = false;
+      description =
+        '' When enable, GNU software is chosent by default whenever a there is
+           a choice between GNU and non-GNU software (e.g., GNU lsh
+           vs. OpenSSH).
+        '';
+    };
+  };
+
+  require =
+    [ ../installer/grub/grub.nix
+      ../services/networking/ssh/sshd.nix
+      ../services/networking/ssh/lshd.nix
+    ];
+
+  config = mkIf config.gnu {
+
+    environment.systemPackages = with pkgs;
+      # TODO: Adjust `requiredPackages' from `system-path.nix'.
+      # TODO: Add Inetutils once it has the new `ifconfig'.
+      [ grub2 parted fdisk
+        nano zile
+        texinfo # for the stand-alone Info reader
+      ];
+
+    # GNU GRUB.
+    boot.loader.grub.enable = true;
+    boot.loader.grub.version = 2;
+
+    # GNU lsh.
+    services.openssh.enable = false;
+    services.lshd.enable = true;
+    services.xserver.startOpenSSHAgent = false;
+    services.xserver.startGnuPGAgent = true;
+
+    # TODO: GNU dico.
+    # TODO: GNU Inetutils' inetd.
+    # TODO: GNU Pies.
+  };
+}
diff --git a/modules/module-list.nix b/modules/module-list.nix
index e51237f1ca0..3cf8096dac1 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -1,4 +1,5 @@
 [ ./config/fonts.nix
+  ./config/gnu.nix
   ./config/i18n.nix
   ./config/krb5.nix
   ./config/ldap.nix