diff --git a/modules/ubus/default.nix b/modules/ubus/default.nix
new file mode 100644
index 0000000..827f537
--- /dev/null
+++ b/modules/ubus/default.nix
@@ -0,0 +1,24 @@
+## ubus
+## ====
+##
+## ubus is a micro-bus à la D-Bus for all your needs.
+
+{ lib, pkgs, config, ...}:
+let
+  inherit (lib) mkOption types;
+  inherit (pkgs) liminix;
+in {
+  options = {
+    system.service.ubus = mkOption {
+      type = liminix.lib.types.serviceDefn;
+    };
+  };
+  config = {
+    system.service.ubus = liminix.callService ./service.nix {
+      package = mkOption {
+        type = types.package;
+        default = pkgs.ubus;
+      };
+    };
+  };
+}
diff --git a/modules/ubus/service.nix b/modules/ubus/service.nix
new file mode 100644
index 0000000..e1e297e
--- /dev/null
+++ b/modules/ubus/service.nix
@@ -0,0 +1,13 @@
+{
+  liminix
+, writeText
+, lib
+}:
+{ package } :
+let
+  inherit (liminix.services) longrun;
+in longrun {
+  # Long term: make it unique so that user can spawn multiple buses if they want.
+  name = "ubus";
+  run = "${package}/bin/ubusd";
+}