diff --git a/flake.nix b/flake.nix
index 141187d8..37f2c26a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -148,6 +148,9 @@
               services.hyperhive.swarm.controller.swarmctlPackage =
                 lib.mkDefault
                   self.packages.${pkgs.stdenv.hostPlatform.system}.swarmctl;
+              services.hyperhive.swarm.ui.package =
+                lib.mkDefault
+                  self.packages.${pkgs.stdenv.hostPlatform.system}.swarm-ui;
               services.hyperhive.gateway.swaggerUiTheme =
                 lib.mkDefault
                   self.packages.${pkgs.stdenv.hostPlatform.system}.swagger-ui-theme;
diff --git a/nix/host-modules/swarm-ui.nix b/nix/host-modules/swarm-ui.nix
index b1da263d..18820162 100644
--- a/nix/host-modules/swarm-ui.nix
+++ b/nix/host-modules/swarm-ui.nix
@@ -9,7 +9,6 @@
 {
   lib,
   config,
-  pkgs,
   ...
 }:
 let
@@ -57,12 +56,17 @@ in
 
     package = lib.mkOption {
       type = lib.types.package;
-      default = pkgs.swarm-ui;
-      defaultText = lib.literalExpression "pkgs.swarm-ui";
+      defaultText = lib.literalExpression "hyperhive.packages.\${system}.swarm-ui";
       description = ''
         Static build of the swarm UI. nginx serves this store path
         directly — there is no server-side component beyond the
         controller's own API.
+
+        Wired by default from this flake's own package set (see
+        `flake.nix`), the same way `swarm.controller.package` is. There
+        is deliberately **no overlay** in this project, so a
+        `pkgs.swarm-ui` default here would name an attribute that does
+        not exist on any real deployment.
       '';
     };
   };