diff --git a/build/src/scittle/build.clj b/build/src/scittle/build.clj
index a643b1f..8586003 100644
--- a/build/src/scittle/build.clj
+++ b/build/src/scittle/build.clj
@@ -21,7 +21,6 @@
 
 (defn- build-cmd [cmd scittle-dir]
   (let [files (feature-files)
-        _ (prn :files files)
         feature-configs (read-configs files)
         ;; Each ./src/scittle_plugin.edn has a ./deps.edn
         feature-dirs (map (comp fs/parent fs/parent) files)
@@ -36,7 +35,6 @@
                                {'scittle/deps {:local/root scittle-dir}})}
                        cmd)
                cmd)]
-    (prn :cmd' cmd')
     (when (seq feature-configs)
       (println "Building features:" (str/join ", " (map :name feature-configs)) "..."))
     (if (seq feature-configs)
@@ -46,7 +44,7 @@
       cmd')))
 
 (defn- build*
-  [cmd args]
+  [cmd]
   (let [building-outside-scittle? (not (fs/exists? "shadow-cljs.edn"))
         scittle-dir (when building-outside-scittle?
                   (->> (classpath/get-classpath)
@@ -57,7 +55,8 @@
     (when building-outside-scittle?
       (fs/copy (fs/file scittle-dir "shadow-cljs.edn") "shadow-cljs.edn"))
     (let [cmd (build-cmd cmd (str scittle-dir))]
-      (apply clojure {:extra-env {"SCI_ELIDE_VARS" "true"}} cmd args))
+      (println "> clojure" cmd)
+      (clojure {:extra-env {"SCI_ELIDE_VARS" "true"}} cmd))
     (when building-outside-scittle?
       (fs/delete "shadow-cljs.edn"))))
 
@@ -68,7 +67,5 @@
   Options:
 
   * :action - compile action, defaults to release, but may also be compile or watch"
-  [args & {:keys [wrap-cmd-fn action] :or {wrap-cmd-fn identity
-                                           action "release"}}]
-  (build* (wrap-cmd-fn (format "-M -m shadow.cljs.devtools.cli --force-spawn %s main" action))
-          args))
+  [{:keys [action] :or {action "release"}}]
+  (build* (format "-M -m shadow.cljs.devtools.cli --force-spawn %s main" action)))
diff --git a/plugins/demo/README.md b/plugins/demo/README.md
new file mode 100644
index 0000000..e9f58eb
--- /dev/null
+++ b/plugins/demo/README.md
@@ -0,0 +1,25 @@
+# Demo
+
+A demo project of a custom scittle build.
+
+See:
+
+- `bb.edn` with
+  - `:deps` which includes:
+    - a dependency on the `scittle.build` project to build scittle + custom features
+    - zero or more plugin dependencies
+    - helpers like static file server
+  - development `:tasks`. Run `bb dev` for development and `bb release` to produce release artifacts.
+- `deps.edn`: this only contains a dependency on scittle itself
+
+Available plugins are in the `plugins` directory inside the top level directory of this repo.
+
+Writing a plugin involves writing
+
+- SCI configuration (this can be shared with users in the [sci.configs](https://github.com/babashka/sci.configs) project
+- Adding a `scittle_plugin.edn` file on the plugin's classpath (e.g. in the `src` directory). This EDN file contains:
+  - `:name`, name of the plugin
+  - `:namespaces`: the namespaces exposed to SCI
+  - `:js`: the name of the produced `.js` module file
+  - `:shadow-config`: the shadow-cljs configuration specific to this plugin
+- A `.cljs` file with an `init` function which calls `scittle/register-plugin!`.
diff --git a/plugins/demo/bb.edn b/plugins/demo/bb.edn
index 8b89747..516f478 100644
--- a/plugins/demo/bb.edn
+++ b/plugins/demo/bb.edn
@@ -1,4 +1,20 @@
-{:deps {acme/custom.scittle {:local/root "."}}
- :tasks {:requires ([scittle.build :as build])
-         release {:task (build/build {})}}}
-x
+{:deps {io.github.babashka/scittle.build {:local/root "../../build"}
+        ;; datascript plugin
+        io.github.babashka/scittle.datascript {:local/root "../../plugins/datascript"}
+        io.github.babashka/http-server
+        {:git/sha "b38c1f16ad2c618adae2c3b102a5520c261a7dd3"}}
+ :tasks
+ {:requires ([scittle.build :as build])
+  watch   {:doc "Watch build"
+           :task (build/build {:action "watch"})}
+  serve {:doc "Starts http server for serving static files"
+         :requires ([babashka.http-server :as http])
+         :task (do (http/serve {:port 1341 :dir "resources/public"})
+                   (println "Serving static assets at http://localhost:1341"))}
+  -dev {:depends [watch serve]
+        :parallel true}
+  dev {:doc "Run compilation in watch mode and start http server"
+       :task (do (run '-dev {:parallel true})
+                 (deref (promise)))}
+  release {:doc "Release build (advanced compiled JS)"
+           :task (build/build {})}}}
diff --git a/plugins/demo/deps.edn b/plugins/demo/deps.edn
index 3594923..62915a5 100644
--- a/plugins/demo/deps.edn
+++ b/plugins/demo/deps.edn
@@ -1,5 +1 @@
-{:deps
- {io.github.babashka/scittle {:local/root "../.."}
-  io.github.babashka/scittle.build {:local/root "../../build"}
-  ;; datascript plugin
-  io.github.babashka/scittle.datascript {:local/root "../../plugins/datascript"}}}
+{:deps {io.github.babashka/scittle {:local/root "../.."}}}