Fix typo and enable btrfs scrubbing

modules/system/devices/disks/btrfs/default.nix

@@ -0,0 +1,4 @@
+{ ... }:
+{
+  services.btrfs.autoScrub.enable = true;
+}

modules/system/devices/disks/default.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   imports = [
+    ./btrfs
     ./filesystems
     ./impermanence
     ./snapper

modules/system/devices/disks/filesystems/default.nix

@@ -1,6 +1,7 @@
-{ ... }:
+{ lib, ... }:
 {
   boot.supportedFilesystems = {                             
     ntfs = true;
+    zfs = lib.mkForce false;
   };
 }