diff --git a/nixos/modules/security/rngd.nix b/nixos/modules/security/rngd.nix
index 5566c53897d..cffa1a5849f 100644
--- a/nixos/modules/security/rngd.nix
+++ b/nixos/modules/security/rngd.nix
@@ -37,6 +37,13 @@ in
 
       after = [ "dev-random.device" ];
 
+      # Clean shutdown without DefaultDependencies
+      conflicts = [ "shutdown.target" ];
+      before = [
+        "sysinit.target"
+        "shutdown.target"
+      ];
+
       description = "Hardware RNG Entropy Gatherer Daemon";
 
       # rngd may have to start early to avoid entropy starvation during boot with encrypted swap