diff --git a/nixos/modules/virtualisation/kubevirt.nix b/nixos/modules/virtualisation/kubevirt.nix
index 5e855d3af06e..6e91a8b67c6f 100644
--- a/nixos/modules/virtualisation/kubevirt.nix
+++ b/nixos/modules/virtualisation/kubevirt.nix
@@ -12,7 +12,7 @@
   ];
 
   config = {
-    fileSystems."/" = {
+    fileSystems."/" = lib.mkImageMediaOverride {
       device = "/dev/disk/by-label/nixos";
       fsType = "ext4";
       autoResize = true;