fix syntax

modules/services/zfs/enable-service.nix

@@ -0,0 +1,16 @@
+{ ... }:
+
+ {
+boot.supportedFilesystems = [ "zfs" ];
+  boot.zfs.forceImportRoot = false;
+  boot.zfs.package = pkgs.zfs_unstable;
+      services.zfs = {
+    autoScrub.enable = true;
+    autoSnapshot.enable = true;
+    trim.enable = true;
+  };
+
+systemd.services.zfs-import-cache.enable = true;
+systemd.services.zfs-mount.enable = true;
+boot.zfs.devNodes = "/dev/disk/by-id";
+ }