diff --git a/modules/nixos/qemu.nix b/modules/nixos/qemu.nix
index dcfedd8..d884ac4 100644
--- a/modules/nixos/qemu.nix
+++ b/modules/nixos/qemu.nix
@@ -17,6 +17,11 @@ in {
           "$@"
       '';
     in {
+      sydnix.impermanence.directories = [
+        # Most importantly, stores images and disks.
+        "/var/lib/libvirt"
+      ];
+
       programs.virt-manager.enable = true;
 
       environment.systemPackages = [