anchor.diff:        enable = true;
         interval = "weekly";
       };
  +
  +    # Enable irqbalance service.
  +    irqbalance.enable = true;
   
       # Enable Plex Media Server.
       plex = {
  
positive.code:   # Some misc packages.
    environment.systemPackages = with pkgs; [
      btrfs-progs
      hdparm
      rtorrent
      samba
  
negative.code: { pkgs, config, ... }:
  
  {
    boot = {
      # Early load i195 for better resolution in init.
      initrd.kernelModules = [ "i915" ];
  
      # Do not load NVIDIA drivers.
      blacklistedKernelModules = [ "nvidia" "nouveau" ];
  
      # Load VFIO related modules.
      kernelModules = [ "vfio_virqfd" "vfio_pci" "vfio_iommu_type1" "vfio" ];
      extraModprobeConfig = "options vfio-pci ids=10de:1c02,10de:10f1";
  
      # Enable IOMMU
      kernelParams = [
        "intel_iommu=on"
      ];
    };
  
    # Enable libvirtd.
    virtualisation = {
  