diff --git a/nixos/systemd-boot.nix b/nixos/systemd-boot.nix
index 7cd57b0..8f593ea 100644
--- a/nixos/systemd-boot.nix
+++ b/nixos/systemd-boot.nix
@@ -38,5 +38,5 @@
   };
 
   # To avoid systemd services hanging on shutdown
-  systemd.extraConfig = "DefaultTimeoutStopSec=10s";
+  systemd.settings.Manager = { DefaultTimeoutStopSec = "10s"; };
 }