diff --git a/modules/nixos/headless/default.nix b/modules/nixos/headless/default.nix
index 65f193e..3f8dcef 100644
--- a/modules/nixos/headless/default.nix
+++ b/modules/nixos/headless/default.nix
@@ -25,10 +25,10 @@ in
       # that we can hopefully still access it remotely.
       enableEmergencyMode = false;
 
-      sleep.extraConfig = ''
-        AllowSuspend=no
-        AllowHibernation=no
-      '';
+      sleep.settings.Sleep = {
+        AllowSuspend = "no";
+        AllowHibernation = "no";
+      };
 
       # For more detail, see:
       #   https://0pointer.de/blog/projects/watchdog.html