diff --git a/metropolis/cli/metroctl/cmd_install_usb.go b/metropolis/cli/metroctl/cmd_install_usb.go
index 4453ed7..5af158a 100644
--- a/metropolis/cli/metroctl/cmd_install_usb.go
+++ b/metropolis/cli/metroctl/cmd_install_usb.go
@@ -38,7 +38,7 @@
 		if err != nil {
 			return err
 		}
-		image, err := oci.ReadLayout(imagePathResolved)
+		image, err := oci.AsImage(oci.ReadLayout(imagePathResolved))
 		if err != nil {
 			return fmt.Errorf("failed to read OS image: %w", err)
 		}