more rearchitecting folders

platforms/nixos/modules/nmasur/presets/zfs.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.nmasur.presets.zfs;
+in
+
+{
+
+  options.nmasur.presets.zfs.enable = lib.mkEnableOption "ZFS file system";
+
+  config = lib.mkIf cfg.enable {
+
+    # Only use compatible Linux kernel, since ZFS can be behind
+    boot.kernelPackages = pkgs.linuxPackages; # Defaults to latest LTS
+    boot.kernelParams = [ "nohibernate" ]; # ZFS does not work with hibernation
+    boot.supportedFilesystems = [ "zfs" ];
+    services.prometheus.exporters.zfs.enable = config.prometheus.exporters.enable;
+    prometheus.scrapeTargets = [
+      "127.0.0.1:${builtins.toString config.services.prometheus.exporters.zfs.port}"
+    ];
+  };
+}