Install keyutils to load the ecryptfs keyring
diff --git a/modules/ecryptfs.nix b/modules/ecryptfs.nix
index e3bf048..81934a7 100644
--- a/modules/ecryptfs.nix
+++ b/modules/ecryptfs.nix
@@ -1,5 +1,6 @@
 { pkgs, ... }: {
   environment.systemPackages = with pkgs; [
     ecryptfs
+    keyutils
   ];
 }