From f8a41f02c7a7c768f1e3996b590c2f2e6b4abfb4 Mon Sep 17 00:00:00 2001
From: Adam Brady <adam@boxxen.org>
Date: Tue, 22 Jul 2025 17:40:20 +0100
Subject: [PATCH] Add RaspberryPi as a build target

---
 flake.nix                    |  2 ++
 nix/builders/rpi/base.nix    | 16 ++++++++++++++++
 nix/builders/rpi/builder.nix |  9 +++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 nix/builders/rpi/base.nix
 create mode 100644 nix/builders/rpi/builder.nix

diff --git a/flake.nix b/flake.nix
index 89c84d9..5c3f650 100644
--- a/flake.nix
+++ b/flake.nix
@@ -53,6 +53,7 @@
         iso = ./nix/builders/iso/base.nix;
         qemu = ./nix/builders/qemu/base.nix;
         nanopc-t6 = ./nix/builders/nanopc-t6/base.nix;
+        rpi = ./nix/builders/rpi/base.nix;
       };
 
       getCopyFlakeScript =
@@ -315,6 +316,7 @@
           t6 = base "aarch64" "nanopc-t6" ./nix/builders/nanopc-t6/builder.nix "raw";
           iso = base "aarch64" "iso" ./nix/builders/iso/builder.nix "iso";
           qemu = qemu-aarch64;
+          rpi = base "aarch64" "rpi" ./nix/builders/rpi/builder.nix "sd-aarch64";
         };
         x86_64-linux = {
           iso = base "x86_64" "iso" ./nix/builders/iso/builder.nix "iso";
diff --git a/nix/builders/rpi/base.nix b/nix/builders/rpi/base.nix
new file mode 100644
index 0000000..ae42490
--- /dev/null
+++ b/nix/builders/rpi/base.nix
@@ -0,0 +1,16 @@
+{ lib, dbxRelease, arch, ... }:
+
+{
+  hardware.enableRedistributableFirmware = lib.mkForce true;
+  boot.initrd.availableKernelModules = [ "xhci_pci" "usbhid" ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+      options = [ "noatime" ];
+    };
+
+  # Need to use extlinux for rpi bootloader.
+  boot.loader.grub.enable = false;
+  boot.loader.generic-extlinux-compatible.enable = true;
+}
diff --git a/nix/builders/rpi/builder.nix b/nix/builders/rpi/builder.nix
new file mode 100644
index 0000000..b2ee39e
--- /dev/null
+++ b/nix/builders/rpi/builder.nix
@@ -0,0 +1,9 @@
+{
+  arch,
+  dbxRelease,
+  ...
+}:
+
+{
+  sdImage.imageName = "dogebox-${dbxRelease}-${arch}.img";
+}