From 9aa91ec7b5d59595281a584e70ee5c19efbee0bb Mon Sep 17 00:00:00 2001
From: Brian McGee <brian@bmcgee.ie>
Date: Wed, 12 Jul 2023 12:10:02 +0100
Subject: [PATCH] build-support/vm: fix makeImageTestScript

`qemu-img create` now requires an additional `-F <second_image_format>` flag.

https://github.com/qemu/qemu/blob/master/docs/about/removed-features.rst#qemu-img-backing-file-without-format-removed-in-61
---
 pkgs/build-support/vm/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index f6baa42348ab..4ec5531192dc 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -494,7 +494,7 @@ rec {
     fi
     diskImage="$1"
     if ! test -e "$diskImage"; then
-      ${qemu}/bin/qemu-img create -b ${image}/disk-image.qcow2 -f qcow2 "$diskImage"
+      ${qemu}/bin/qemu-img create -b ${image}/disk-image.qcow2 -f qcow2 -F qcow2 "$diskImage"
     fi
     export TMPDIR=$(mktemp -d)
     export out=/dummy