diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index 64f4a759e1b..ea6c6cf790c 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -1,6 +1,6 @@
 { pkgs
 , kernel ? pkgs.linux
-, img ? "bzImage"
+, img ? pkgs.stdenv.platform.kernelTarget
 , storeDir ? builtins.storeDir
 , rootModules ?
     [ "virtio_pci" "virtio_mmio" "virtio_blk" "virtio_balloon" "virtio_rng" "ext4" "unix" "9p" "9pnet_virtio" "rtc_cmos" ]