diff --git a/modules/impermanence.nix b/modules/impermanence.nix
index c498b4f..1df8dad 100644
--- a/modules/impermanence.nix
+++ b/modules/impermanence.nix
@@ -30,6 +30,7 @@
 
       environment.persistence."/persist".directories = [
         "/var/lib/nixos"
+        "/var/lib/acme"
       ];
 
       boot.initrd.postDeviceCommands = let