diff --git a/modules/flake-parts/tfgrid-microvm/default.nix b/modules/flake-parts/tfgrid-microvm/default.nix
index 946017b1..d079c753 100644
--- a/modules/flake-parts/tfgrid-microvm/default.nix
+++ b/modules/flake-parts/tfgrid-microvm/default.nix
@@ -32,7 +32,7 @@ in {
         "virtio_mmio"
       ];
 
-      boot.loader.grub.enable = true;
+      boot.loader.grub.enable = false;
       boot.initrd.systemd.enable = false;
       boot.loader.grub.device = "nodev";
 
diff --git a/modules/flake-parts/tfgrid-microvm/mk-zos-vm-dir.nix b/modules/flake-parts/tfgrid-microvm/mk-zos-vm-dir.nix
index 62d00c5d..66388eaf 100644
--- a/modules/flake-parts/tfgrid-microvm/mk-zos-vm-dir.nix
+++ b/modules/flake-parts/tfgrid-microvm/mk-zos-vm-dir.nix
@@ -30,5 +30,10 @@ in
     storeContents = pkgs2storeContents [
       config.system.build.toplevel
       pkgs.stdenvNoCC
+
+
+      # these are also needed on the target for nixos-rebuild to work
+      # pkgs.path
+      # config.system.build.toplevel.drvPath
     ];
   }