diff --git a/modules/services/web-servers/nginx/default.nix b/modules/services/web-servers/nginx/default.nix
index da08751d0b5a..b26af1aa7445 100644
--- a/modules/services/web-servers/nginx/default.nix
+++ b/modules/services/web-servers/nginx/default.nix
@@ -74,14 +74,15 @@ in
       };
     };
 
-    users.extraUsers = optionalAttrs (cfg.user == "nginx") singleton
-    { name = "nginx";
-      group = "nginx";
-      uid = config.ids.uids.nginx;
-    };
+    users.extraUsers = optionalAttrs (cfg.user == "nginx") (singleton
+      { name = "nginx";
+        group = "nginx";
+        uid = config.ids.uids.nginx;
+      });
 
-    users.extraGroups = optionalAttrs (cfg.group == "nginx") singleton
-    { name = "nginx";
-      gid = config.ids.gids.nginx;
-    };
+    users.extraGroups = optionalAttrs (cfg.group == "nginx") (singleton
+      { name = "nginx";
+        gid = config.ids.gids.nginx;
+      });
+  };
 }