diff --git a/README.md b/README.md
index 738c3df..b1ae7c7 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Thebacknd is a proof-of-concept to run a NixOS system as a DigitalOcean virtual
 machine in a single command.
 
 ```
-$ scripts/build-toplevel.sh
+$ scripts/build-toplevels.sh
 /nix/store/lk6igl2f0i137q36wscfrc6n9r0jn52l-nixos-system-unnamed-23.05pre-git
 $ scripts/thebacknd-run /nix/store/lk6igl2f0i137q36wscfrc6n9r0jn52l-nixos-system-unnamed-23.05pre-git
 ```
diff --git a/default.nix b/default.nix
index e88b6c7..c1c25e8 100644
--- a/default.nix
+++ b/default.nix
@@ -14,26 +14,35 @@ let
     rustc = toolchain;
   };
 
-  os = import "${toString sources.nixpkgs}/nixos/lib/eval-config.nix" {
+  base = import "${toString sources.nixpkgs}/nixos/lib/eval-config.nix" {
     modules = [
       "${toString sources.nixpkgs}/nixos/modules/virtualisation/digital-ocean-image.nix"
-      ./machine/configuration.nix
+      ./machines/base/configuration.nix
     ];
   };
 
   qemu = import "${toString sources.nixpkgs}/nixos/lib/eval-config.nix" {
     modules = [
       "${toString sources.nixpkgs}/nixos/modules/virtualisation/qemu-vm.nix"
-      ./machine/configuration.nix
-      ./machine/no-gui.nix
+      ./machines/base/configuration.nix
+      ./machines/base/no-gui.nix
+    ];
+  };
+
+  example = import "${toString sources.nixpkgs}/nixos/lib/eval-config.nix" {
+    modules = [
+      "${toString sources.nixpkgs}/nixos/modules/virtualisation/digital-ocean-image.nix"
+      ./machines/base/configuration.nix
+      ./machines/example/hello.nix
     ];
   };
 
 in rec
   {
     # Build with nix-build -A <attr>
-    toplevel = os.config.system.build.toplevel;
-    image = os.config.system.build.digitalOceanImage;
+    toplevels.base = base.config.system.build.toplevel;
+    toplevels.example = example.config.system.build.toplevel;
+    image = base.config.system.build.digitalOceanImage;
     runvm = qemu.config.system.build.vm;
     binaries = naersk.buildPackage ./.;
 
diff --git a/machine/configuration.nix b/machines/base/configuration.nix
similarity index 100%
rename from machine/configuration.nix
rename to machines/base/configuration.nix
diff --git a/machine/no-gui.nix b/machines/base/no-gui.nix
similarity index 100%
rename from machine/no-gui.nix
rename to machines/base/no-gui.nix
diff --git a/machine/scripts.nix b/machines/base/scripts.nix
similarity index 85%
rename from machine/scripts.nix
rename to machines/base/scripts.nix
index 12c49c1..cf4739e 100644
--- a/machine/scripts.nix
+++ b/machines/base/scripts.nix
@@ -1,7 +1,7 @@
 { pkgs }:
 let
 current-system = pkgs.runCommandLocal "current-system" {
-  script = ../scripts/current-system.sh;
+  script = ../../scripts/current-system.sh;
   nativeBuildInputs = [ pkgs.makeWrapper ];
 } ''
   makeWrapper $script $out/bin/current-system \
@@ -9,7 +9,7 @@ current-system = pkgs.runCommandLocal "current-system" {
 '';
 
 desired-system = pkgs.runCommandLocal "desired-system" {
-  script = ../scripts/desired-system.sh;
+  script = ../../scripts/desired-system.sh;
   nativeBuildInputs = [ pkgs.makeWrapper pkgs.curl ];
 } ''
   makeWrapper $script $out/bin/desired-system \
@@ -17,7 +17,7 @@ desired-system = pkgs.runCommandLocal "desired-system" {
 '';
 
 destroy-system = pkgs.runCommandLocal "destroy-system" {
-  script = ../scripts/destroy-system.sh;
+  script = ../../scripts/destroy-system.sh;
   nativeBuildInputs = [ pkgs.makeWrapper pkgs.curl pkgs.jq ];
 } ''
   makeWrapper $script $out/bin/destroy-system \
@@ -25,7 +25,7 @@ destroy-system = pkgs.runCommandLocal "destroy-system" {
 '';
 
 update-system = pkgs.runCommandLocal "update-system" {
-  script = ../scripts/update-system.sh;
+  script = ../../scripts/update-system.sh;
   nativeBuildInputs = [ pkgs.makeWrapper ];
 } ''
   install -m755 $script -D $out/bin/update-system
diff --git a/machines/example/hello.nix b/machines/example/hello.nix
new file mode 100644
index 0000000..1f528c8
--- /dev/null
+++ b/machines/example/hello.nix
@@ -0,0 +1,7 @@
+{ config, lib, pkgs,
+  ... }:
+{
+  environment.systemPackages = [
+    pkgs.hello
+  ];
+}
diff --git a/scripts/build-toplevel.sh b/scripts/build-toplevels.sh
similarity index 50%
rename from scripts/build-toplevel.sh
rename to scripts/build-toplevels.sh
index 70b12dd..31c701a 100755
--- a/scripts/build-toplevel.sh
+++ b/scripts/build-toplevels.sh
@@ -1,26 +1,36 @@
 #! /usr/bin/env bash
 
-# Build, sign, and cache the toplevel and binaries.
+# Build, sign, and cache the toplevels and binaries.
 
-nix-build -A toplevel --out-link result-toplevel
+nix-build -A toplevels.base --out-link result-toplevel-base
+nix-build -A toplevels.example --out-link result-toplevel-example
 nix-build -A binaries --out-link result-binaries
 
 nix store sign \
   --recursive \
   --key-file signing-keys/cache-priv-key.pem \
-  $(readlink ./result-toplevel)
+  $(readlink ./result-toplevel-base)
+nix store sign \
+  --recursive \
+  --key-file signing-keys/cache-priv-key.pem \
+  $(readlink ./result-toplevel-example)
 nix store sign \
   --recursive \
   --key-file signing-keys/cache-priv-key.pem \
   $(readlink ./result-binaries)
 
+exit 0
+
 set -a
 source .env-nix-build
 set +a
 
 nix copy --to \
   's3://hypered-private-store/cache?endpoint=s3.eu-central-003.backblazeb2.com' \
-  $(readlink ./result-toplevel)
+  $(readlink ./result-toplevel-base)
+nix copy --to \
+  's3://hypered-private-store/cache?endpoint=s3.eu-central-003.backblazeb2.com' \
+  $(readlink ./result-toplevel-example)
 nix copy --to \
   's3://hypered-private-store/cache?endpoint=s3.eu-central-003.backblazeb2.com' \
   $(readlink ./result-binaries)