diff --git a/tests/driver-nova.nix b/tests/driver-nova.nix
index 8e14aa7..1182ab0 100644
--- a/tests/driver-nova.nix
+++ b/tests/driver-nova.nix
@@ -104,7 +104,6 @@ let
           		-iso-level 2 \
           		boot
           	}
-          	puts "built ISO?"
           }
 
           ##
@@ -151,6 +150,10 @@ let
           	set out $env(out)
           	build_iso $out/test.iso
 
+          	set fd [open "$out/nix-support/hydra-build-products" w]
+          	puts $fd "file iso $out/test.iso"
+          	close $fd
+
           	global spawn_id
           	spawn ${hostPkgs.qemu_test}/bin/qemu-system-x86_64 -cdrom $out/test.iso -nographic -m $qemu_mem
           	wait_for_output $wait_for_re $timeout_value $spawn_id