diff --git a/nixos/boxes/foureighty.nix b/nixos/boxes/foureighty.nix
index d2175f6e..44908f90 100644
--- a/nixos/boxes/foureighty.nix
+++ b/nixos/boxes/foureighty.nix
@@ -4,7 +4,15 @@
 
  networking.hostName = "foureighty";
  boot = {
+    kernelPackages = pkgs.linuxPackages_latest;
+    extraModulePackages = with config.boot.kernelPackages; [ wireguard ];
     initrd.kernelModules = [ "i915" ];
+    initrd.availableKernelModules = [
+      "aes_x86_64"
+      "crypto_simd"
+      "aesni_intel"
+      "cryptd"
+    ];
     kernelParams = [
       "i915.enable_fbc=1"
       "i915.enable_psr=2"
@@ -65,6 +73,12 @@
     ];
   };
 
+  virtualisation.virtualbox.host = {
+    enable = true;
+    enableExtensionPack = true;
+    enableHardening = false; #needed for 3D acceleration
+  };
+
   imports = [
     /etc/nixos/hardware-configuration.nix
     ../boot.nix
diff --git a/nixos/syncthing.nix b/nixos/syncthing.nix
index ae314ff6..a6641d88 100644
--- a/nixos/syncthing.nix
+++ b/nixos/syncthing.nix
@@ -1,9 +1,20 @@
 { config, pkgs, ... }:
+let
+  unstableTarball = fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz;
+in
 {
+    nixpkgs.config = {
+      packageOverrides = pkgs: {
+        unstable = import unstableTarball {
+          config = config.nixpkgs.config;
+        };
+      };
+    };
     services.syncthing = {
         enable = true;
         user = "cyryl";
         dataDir = "/home/cyryl/.syncthing";
         openDefaultPorts = true;
+        package = pkgs.unstable.syncthing;
     };
-}
\ No newline at end of file
+}