diff --git a/nixos/modules/services/security/hologram-agent.nix b/nixos/modules/services/security/hologram-agent.nix
index 6c53a2df6306..39ed506f7617 100644
--- a/nixos/modules/services/security/hologram-agent.nix
+++ b/nixos/modules/services/security/hologram-agent.nix
@@ -35,10 +35,9 @@ in {
   config = mkIf cfg.enable {
     boot.kernelModules = [ "dummy" ];
 
-    networking.interfaces.dummy0 = {
-      ipAddress = "169.254.169.254";
-      prefixLength = 32;
-    };
+    networking.interfaces.dummy0.ipv4.addresses = [
+      { address = "169.254.169.254"; prefixLength = 32; }
+    ];
 
     systemd.services.hologram-agent = {
       description = "Provide EC2 instance credentials to machines outside of EC2";