apply rpi config error fix

flake.lock

@@ -962,6 +962,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-rpi": {
+      "locked": {
+        "lastModified": 1737645144,
+        "narHash": "sha256-QPTPf1ccrGTIgKA+/a3MIqrKiUbxhUSRUCQll86kUl8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d4e529a24b66b0341f2b866c5abe3ad8a96be2d7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d4e529a24b66b0341f2b866c5abe3ad8a96be2d7",
+        "type": "github"
+      }
+    },
     "nixpkgs-stable": {
       "locked": {
         "lastModified": 1724316499,
@@ -1225,6 +1241,7 @@
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_5",
         "nixpkgs-garage": "nixpkgs-garage",
+        "nixpkgs-rpi": "nixpkgs-rpi",
         "nixvim": "nixvim",
         "nvim-github-theme": "nvim-github-theme",
         "rust-overlay": "rust-overlay",

flake.nix

@@ -69,6 +69,7 @@
       inputs.flake-compat.follows = "flake-compat";
     };
     nixos-hardware.url = "github:nixos/nixos-hardware";
+    nixpkgs-rpi.url = "github:nixos/nixpkgs/d4e529a24b66b0341f2b866c5abe3ad8a96be2d7";
 
     nixpkgs-garage.url = "github:cything/nixpkgs/garage-module"; # unmerged PR
 

hosts/pancake/default.nix

@@ -1,6 +1,8 @@
 {
   modulesPath,
   pkgs,
+  lib,
+  inputs,
   ...
 }:
 {
@@ -71,4 +73,7 @@
   boot.loader.generic-extlinux-compatible.mirroredBoots = [
     { path = "/boot/firmware"; }
   ];
+
+  # remove this after https://github.com/NixOS/nixpkgs/pull/375165 lands on unstable
+  boot.kernelPackages = lib.mkForce inputs.nixpkgs-rpi.legacyPackages.aarch64-linux.linuxKernel.packages.linux_rpi3;
 }