From 5ba57fb5024dddd3c7ce31bb3b54a99965684317 Mon Sep 17 00:00:00 2001
From: Astro <sm@m-labs.hk>
Date: Wed, 12 Oct 2022 21:05:39 +0200
Subject: [PATCH] wfvm/win: pass format of backing image to qemu-img

required since qemu 6.1.0
---
 wfvm/win.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wfvm/win.nix b/wfvm/win.nix
index 091da95..b4ac2b3 100644
--- a/wfvm/win.nix
+++ b/wfvm/win.nix
@@ -158,8 +158,9 @@ let
     ]);
 
   in ''
+    set -x
     # Create an image referencing the previous image in the chain
-    qemu-img create -f qcow2 -b ${acc} c.img
+    qemu-img create -F qcow2 -f qcow2 -b ${acc} c.img
 
     set -m
     qemu-system-x86_64 ${lib.concatStringsSep " " qemuParams} &