diff --git a/modules/virtualization/main.mcl b/modules/virtualization/main.mcl
index 99a6ae02..deafeafa 100644
--- a/modules/virtualization/main.mcl
+++ b/modules/virtualization/main.mcl
@@ -68,8 +68,7 @@ class vm($name, $config) {
 	# TODO: fix secondary auto-indexing with tmp-prefix (let it mutate old machines)
 	$i = local.pool("libvirt-vm", $name) # the uid will always return the same int
 
-	# TODO: qcow2?
-	$format = $config->format || "raw" # used for file extension and parameter name
+	$format = $config->format || "qcow2" # used for file extension and parameter name
 	$index = $config->index || $i
 	$distro_uid = $config->distro_uid || "fedora41-x86_64"
 	$sshkey struct{ssh_type str; ssh_key str; ssh_comment str} = $config->sshkey # TODO: unification