move ensureZfsMounts

tests/zfs.nix

@@ -2,9 +2,17 @@
   config,
   lib,
   pkgs,
+  inputs,
   ...
 }:
-pkgs.testers.runNixOSTest {
+let
+  # Create pkgs with ensureZfsMounts overlay
+  testPkgs = import inputs.nixpkgs {
+    system = pkgs.system;
+    overlays = [ (import ../overlays.nix) ];
+  };
+in
+testPkgs.testers.runNixOSTest {
   name = "zfs folder dependency and mounting test";
 
   nodes.machine =
@@ -35,7 +43,7 @@ pkgs.testers.runNixOSTest {
 
       environment.systemPackages = [
         pkgs.parted
-        lib.ensureZfsMounts
+        pkgs.ensureZfsMounts
       ];
 
       systemd.services.foobar = {