diff --git a/bin/os b/bin/os
index 176ac3d..635d259 100755
Binary files a/bin/os and b/bin/os differ
diff --git a/flake.nix b/flake.nix
index c59284e..06e9b49 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,8 @@
         pkgs.gnumake
         pkgs.mtools
         pkgs.gptfdisk
+        # for testing
+        pkgs.qemu
       ];
     };
   };
diff --git a/image.hdd b/image.hdd
index 050e2d7..d999482 100644
Binary files a/image.hdd and b/image.hdd differ