diff --git a/modules/config/impermanence.nix b/modules/config/impermanence.nix
index 6f6bf56..a9a9d79 100644
--- a/modules/config/impermanence.nix
+++ b/modules/config/impermanence.nix
@@ -49,7 +49,7 @@ in {
   # persistence options that we defined above.
   imports = let
     mkUserFiles = map (x:
-      {mode = "600";}
+      {parentDirectory.mode = "700";}
       // (
         if isAttrs x
         then x
diff --git a/users/common/impermanence.nix b/users/common/impermanence.nix
index 392f97f..e7d3af9 100644
--- a/users/common/impermanence.nix
+++ b/users/common/impermanence.nix
@@ -1,8 +1,11 @@
 {
   config,
   nixosConfig,
+  lib,
   ...
-}: {
+}: let
+  inherit (lib) optionals;
+in {
   home.persistence."/state".files =
     [
       # nothing yet ...
@@ -28,7 +31,7 @@
       ".local/state/nvim"
       ".cache/nvim"
     ]
-    ++ optionals nixosConfig.hardware.nvidia.enable [
+    ++ optionals nixosConfig.hardware.nvidia.modesetting.enable [
       ".cache/nvidia" # GLCache
     ]
     ++ optionals nixosConfig.services.pipewire.enable [
diff --git a/users/root/default.nix b/users/root/default.nix
index a64cfaf..01d07ec 100644
--- a/users/root/default.nix
+++ b/users/root/default.nix
@@ -1,6 +1,5 @@
 {
   config,
-  lib,
   pkgs,
   ...
 }: {
@@ -10,6 +9,10 @@
     shell = pkgs.zsh;
   };
 
+  # This cannot currently be derived automatically due to a design flaw in nixpkgs.
+  environment.persistence."/state".users.root.home = "/root";
+  environment.persistence."/persist".users.root.home = "/root";
+
   home-manager.users.root = {
     imports = [
       ../common