anchor.diff: -{ pkgs, lib, ... }:
  -
  -with lib;
  +{ config, pkgs, lib, ... }:
   
   let
  +  inherit (lib) mkIf mkDefault;
  +  cfg = config.openstack;
     metadataFetcher = import ./openstack-metadata-fetcher.nix {
       targetRoot = "/";
       wgetExtraOptions = "--retry-connrefused";
  
positive.code:       path = [ pkgs.wget ];
        description = "Fetch Metadata on startup";
        wantedBy = [ "multi-user.target" ];
        before = [ "apply-ec2-data.service" "amazon-init.service"];
        wants = [ "network-online.target" ];
        after = [ "network-online.target" ];
        script = metadataFetcher;
  
negative.code:   ];
  
    config = {
      fileSystems."/" = mkIf (!cfg.zfs.enable) {
        device = "/dev/disk/by-label/nixos";
        fsType = "ext4";
        autoResize = true;
      };
  
      fileSystems."/boot" = mkIf (cfg.efi || cfg.zfs.enable) {
        # The ZFS image uses a partition labeled ESP whether or not we're
        # booting with EFI.
        device = "/dev/disk/by-label/ESP";
        fsType = "vfat";
      };
  
      boot.growPartition = true;
      boot.kernelParams = [ "console=ttyS0" ];
      boot.loader.grub.device = if (!cfg.efi) then "/dev/vda" else "nodev";
      boot.loader.grub.efiSupport = cfg.efi;
      boot.loader.grub.efiInstallAsRemovable = cfg.efi;
  
      services.zfs.expandOnBoot = mkIf cfg.zfs.enable "all";
      boot.zfs.devNodes = mkIf cfg.zfs.enable "/dev/";
  
      # Allow root logins
      services.openssh = {
  