diff --git a/ops/nixos/blade-paris/default.nix b/ops/nixos/blade-paris/default.nix
index fbfce4e5cd..66c8ede10b 100644
--- a/ops/nixos/blade-paris/default.nix
+++ b/ops/nixos/blade-paris/default.nix
@@ -20,6 +20,7 @@ in {
   };
   my.ip.tailscale = "100.117.185.118";
   my.ip.tailscale6 = "fd7a:115c:a1e0:ab12:4843:cd96:6275:b976";
+  my.blade.onZFS = false;
   my.blade.bay = 2;
   my.blade.macAddress = {
     internal = "e4:11:5b:ac:e4:8a";
diff --git a/ops/nixos/lib/blade.nix b/ops/nixos/lib/blade.nix
index 581a02a158..da7e49d68e 100644
--- a/ops/nixos/lib/blade.nix
+++ b/ops/nixos/lib/blade.nix
@@ -30,6 +30,8 @@ in {
       type = lib.types.nullOr lib.types.str;
       default = null;
     };
+
+    onZFS = lib.mkOption { type = lib.types.bool; default = true; };
   };
 
   config = {
@@ -62,18 +64,24 @@ in {
         options = [ "defaults" "size=${size}" "mode=755" ];
       };
     in {
-      "/" = zfs "tank/local/root";
-      "/tmp" = zfs "tank/local/tmp";
-      "/nix" = zfs "tank/local/nix";
-      "/var" = zfs "tank/safe/var";
-      "/home" = zfs "tank/safe/home";
       "/boot" = {
         device = "/dev/disk/by-label/boot";
         fsType = "ext4";
       };
       "/var/log" = tmpfs "2G";
       "/var/cache" = tmpfs "16G";
-    } // (lib.optionalAttrs (config.services.ceph.osd.enable || config.services.ceph.mgr.enable || config.services.ceph.mon.enable || config.services.ceph.mgr.enable) {
+    } // (lib.optionalAttrs (config.my.blade.onZFS) {
+      "/" = zfs "tank/local/root";
+      "/tmp" = zfs "tank/local/tmp";
+      "/nix" = zfs "tank/local/nix";
+      "/var" = zfs "tank/safe/var";
+      "/home" = zfs "tank/safe/home";
+    }) // (lib.optionalAttrs (!config.my.blade.onZFS) {
+      "/" = {
+        device = "/dev/disk/by-label/root";
+        fsType = "ext4";
+      };
+    }) // (lib.optionalAttrs (config.services.ceph.osd.enable || config.services.ceph.mgr.enable || config.services.ceph.mon.enable || config.services.ceph.mgr.enable) {
       "/var/lib/ceph" = {
         device = "/dev/disk/by-label/var-lib-ceph";
         fsType = "xfs";