Move from ZFS to btrfs

hosts/nixos-testbed/configuration.nix

@@ -7,11 +7,11 @@
 
   sydnix = {
     impermanence = {
-      enable = true;
+      enable = false;
       directories = [
-        # Warning: Neither /var/lib/nixos nor any of its parents are persisted.
+        # "Warning: Neither /var/lib/nixos nor any of its parents are persisted.
         # This means all users/groups without specified uids/gids will have them
-        # reassigned on reboot.
+        # reassigned on reboot."
         "/var/lib/nixos"
         "/etc/ssh"
       ];
@@ -30,11 +30,11 @@
       enable = true;
       systemd.enable = true;
 
-      systemd.initrdBin = with pkgs; [
-        zfs
-        coreutils
-        babashka
-      ];
+      # systemd.initrdBin = with pkgs; [
+      #   zfs
+      #   coreutils
+      #   babashka
+      # ];
     };
 
     loader = {