diff --git a/hosts/midgard/default.nix b/hosts/midgard/default.nix
index f60f701..3aa40ac 100644
--- a/hosts/midgard/default.nix
+++ b/hosts/midgard/default.nix
@@ -1 +1,14 @@
-# TODO: Define the midgard host.
+{ ... }:
+
+{
+  # Enable these imports after collecting disk IDs and generated hardware config
+  # during the NixOS installer phase.
+  # imports = [
+  #   ./hardware-configuration.nix
+  #   ./disko.nix
+  # ];
+
+  networking.hostName = "midgard";
+
+  system.stateVersion = "25.11";
+}
diff --git a/hosts/midgard/disko.nix b/hosts/midgard/disko.nix
index 384843a..2337a90 100644
--- a/hosts/midgard/disko.nix
+++ b/hosts/midgard/disko.nix
@@ -1 +1,5 @@
-# TODO: Define the midgard disk layout.
+{ ... }:
+
+{
+  # TODO: Define the midgard disk layout.
+}
diff --git a/hosts/midgard/hardware-configuration.nix b/hosts/midgard/hardware-configuration.nix
index 669fda2..d55143b 100644
--- a/hosts/midgard/hardware-configuration.nix
+++ b/hosts/midgard/hardware-configuration.nix
@@ -1 +1,5 @@
-# TODO: Replace with generated midgard hardware configuration.
+{ ... }:
+
+{
+  # TODO: Replace with generated midgard hardware configuration.
+}
diff --git a/hosts/yggdrasil/default.nix b/hosts/yggdrasil/default.nix
index a0dfc2a..9303c66 100644
--- a/hosts/yggdrasil/default.nix
+++ b/hosts/yggdrasil/default.nix
@@ -1 +1,14 @@
-# TODO: Define the yggdrasil host.
+{ ... }:
+
+{
+  # Enable these imports after collecting disk IDs and generated hardware config
+  # during the NixOS installer phase.
+  # imports = [
+  #   ./hardware-configuration.nix
+  #   ./disko.nix
+  # ];
+
+  networking.hostName = "yggdrasil";
+
+  system.stateVersion = "25.11";
+}
diff --git a/hosts/yggdrasil/disko.nix b/hosts/yggdrasil/disko.nix
index 39fdf52..2f65591 100644
--- a/hosts/yggdrasil/disko.nix
+++ b/hosts/yggdrasil/disko.nix
@@ -1 +1,5 @@
-# TODO: Define the yggdrasil disk layout.
+{ ... }:
+
+{
+  # TODO: Define the yggdrasil disk layout.
+}
diff --git a/hosts/yggdrasil/hardware-configuration.nix b/hosts/yggdrasil/hardware-configuration.nix
index 80f8e3e..09b0e4c 100644
--- a/hosts/yggdrasil/hardware-configuration.nix
+++ b/hosts/yggdrasil/hardware-configuration.nix
@@ -1 +1,5 @@
-# TODO: Replace with generated yggdrasil hardware configuration.
+{ ... }:
+
+{
+  # TODO: Replace with generated yggdrasil hardware configuration.
+}