diff --git a/sd-image.nix b/sd-image.nix
index cf854f38..f610da5d 100644
--- a/sd-image.nix
+++ b/sd-image.nix
@@ -1,9 +1,9 @@
 # Raspberry Pi SD Image
 # $ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix
 # https://nixos.wiki/wiki/NixOS_on_ARM#Installation
-{ ... }: {
+{ config, ... }: {
   nixpkgs.crossSystem.system = "armv7l-linux";
-  
+
   # Simple bootstrap SD image for the Raspberry Pi
   imports = [
     <nixpkgs/nixos/modules/installer/sd-card/sd-image-aarch64.nix>