zfsborg: sleep a bit before mounting

modules/base/zfsborg/default.nix

@@ -4,8 +4,9 @@
   pkgs,
   ...
 }: let
-  mkPreHook = mountpoint: zfs_name: ''
+  mkPreHook = mountpoint: zfs_name: i: ''
     set -x
+    sleep ${toString i}
     mkdir "$RUNTIME_DIRECTORY/snapshot"
     ${pkgs.util-linux}/bin/mount \
       -t zfs \
@@ -78,7 +79,7 @@ in {
                   extraArgs = "--remote-path=borg1";
                   compression = "auto,lzma";
                   startAt = attrs.backup_at;
-                  preHook = mkPreHook mountpoint fs.device;
+                  preHook = mkPreHook mountpoint fs.device i;
                   prune.keep = {
                     within = "1d";
                     daily = 7;