diff --git a/hosts/build01/default.nix b/hosts/build01/default.nix
index cb7d7b0aa..8fc10afcd 100644
--- a/hosts/build01/default.nix
+++ b/hosts/build01/default.nix
@@ -1,4 +1,4 @@
-{ inputs, ... }:
+{ inputs, pkgs, ... }:
 {
   imports = [
     inputs.self.nixosModules.cgroups
@@ -7,6 +7,8 @@
     inputs.srvos.nixosModules.hardware-hetzner-online-amd
   ];
 
+  boot.kernelPackages = pkgs.linuxKernel.packages.linux_6_12;
+
   nix.settings.max-jobs = 24;
 
   nixpkgs.hostPlatform.gcc.arch = "znver2";
diff --git a/hosts/build05/default.nix b/hosts/build05/default.nix
index c2b70a83b..0a7aa32e8 100644
--- a/hosts/build05/default.nix
+++ b/hosts/build05/default.nix
@@ -1,4 +1,4 @@
-{ inputs, ... }:
+{ inputs, pkgs, ... }:
 {
   imports = [
     inputs.self.nixosModules.cgroups
@@ -7,6 +7,8 @@
     inputs.srvos.nixosModules.hardware-hetzner-online-arm
   ];
 
+  boot.kernelPackages = pkgs.linuxKernel.packages.linux_6_12;
+
   nix.settings.max-jobs = 80;
 
   nixpkgs.hostPlatform.gcc.arch = "armv8-a";
diff --git a/modules/nixos/common/builder.nix b/modules/nixos/common/builder.nix
index 950b29df7..e11d520ac 100644
--- a/modules/nixos/common/builder.nix
+++ b/modules/nixos/common/builder.nix
@@ -9,7 +9,7 @@
   config = lib.mkIf (lib.hasPrefix "build" config.networking.hostName) {
     nix.gc.automatic = false;
 
-    boot.kernelPackages = pkgs.linuxKernel.packages.linux_6_6;
+    boot.kernelPackages = lib.mkDefault pkgs.linuxKernel.packages.linux_6_6;
 
     boot.zfs.package = pkgs.zfs_2_3;