diff --git a/docs/setup-example.nix b/docs/setup-example.nix
index 702b7e3..c2b4dd0 100644
--- a/docs/setup-example.nix
+++ b/docs/setup-example.nix
@@ -25,7 +25,10 @@
   networking.firewall.allowedTCPPorts = [ 80 ];
 
   # Enable ACME HTTP-01 challenge with nginx
-  services.nginx.virtualHosts.${config.mailserver.fqdn}.enableACME = true;
+  services.nginx = {
+    enable = true;
+    virtualHosts.${config.mailserver.fqdn}.enableACME = true;
+  };
 
   mailserver = {
     enable = true;