sdImage output

hosts/pi/default.nix

@@ -11,13 +11,12 @@
   hardware = {
     raspberry-pi."4" = {
       apply-overlays-dtmerge.enable = true;
-      audio = false;
+      audio.enable = false;
       fkms-3d.enable = true;
       xhci.enable = true;
     };
     deviceTree = {
       enable = true;
-      filter = "*rpi-4-*.dtb";
       overlays = [
         { name = "hifiberry-digi-pro"; dtboFile = "${pkgs.device-tree_rpi.overlays}/hifiberry-digi-pro.dtbo"; }
       ];
@@ -57,7 +56,7 @@
 
   services.shairport-sync = {
     enable = true;
-    group = [ "pipewire" ];
+    group = "pipewire";
     openFirewall = true;
   };
 

hosts/pi/hardware-configuration.nix

@@ -2,10 +2,14 @@
 
 {
   imports = [
-    <nixos-hardware/raspberry-pi/4>
+    (modulesPath + "/installer/sd-card/sd-image-aarch64.nix")
   ];
 
-  boot.cleanTmpDir = true;
+  boot = {
+    # Stop ZFS kernel being built
+    supportedFilesystems = lib.mkForce [ "btrfs" "cifs" "f2fs" "jfs" "ntfs" "reiserfs" "vfat" "xfs" ];
+    tmp.cleanOnBoot = true;
+  };
 
   fileSystems = {
     "/" = {