diff --git a/nodes/hosts/lappy/configuration.nix b/nodes/hosts/lappy/configuration.nix
index fd0a8f7..a5ea5b2 100644
--- a/nodes/hosts/lappy/configuration.nix
+++ b/nodes/hosts/lappy/configuration.nix
@@ -9,6 +9,7 @@
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
       ./filesystems.nix
+      ./programs/sof-firmware.nix
     ];
 
   # Use the systemd-boot EFI boot loader.
diff --git a/nodes/hosts/lappy/programs/sof-firmware.nix b/nodes/hosts/lappy/programs/sof-firmware.nix
new file mode 100644
index 0000000..4e9d9ec
--- /dev/null
+++ b/nodes/hosts/lappy/programs/sof-firmware.nix
@@ -0,0 +1,8 @@
+{ pkgs, ... }: {
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = [
+    pkgs.sof-firmware
+  ];
+}
+