diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index bd964723d40..6423432c78b 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -274,7 +274,7 @@ in
 
     virtualisation.writableStore =
       mkOption {
-        default = false;
+        default = true; # FIXME
         description =
           ''
             If enabled, the Nix store in the VM is made writable by