From 0d4bf9c4d836f8e8570ad1d39245a5835ef4aaf1 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 15 Sep 2022 15:56:46 +0200
Subject: [PATCH] Fix evaluation

---
 tests/installer/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/installer/default.nix b/tests/installer/default.nix
index eab103562..c118937a6 100644
--- a/tests/installer/default.nix
+++ b/tests/installer/default.nix
@@ -139,7 +139,7 @@ let
 
         qemu-img create -b ./${image.rootDisk} -F "$image_type" -f qcow2 ./disk.qcow2
 
-        extra_qemu_opts="${image.extraQemuOpts}"
+        extra_qemu_opts="${image.extraQemuOpts or ""}"
 
         # Add the config disk, required by the Ubuntu images.
         config_drive=$(echo *configdrive.vmdk || true)