diff --git a/build.sh b/build.sh
index 5226e68..8adb0cc 100755
--- a/build.sh
+++ b/build.sh
@@ -1,27 +1,72 @@
 #!/usr/bin/env bash
 
+base=${PWD}
+
 rm -rf /tmp/flarum-release
 mkdir /tmp/flarum-release
 
-git archive --format zip HEAD > /tmp/flarum-release/release.zip
+git archive --format zip --worktree-attributes HEAD > /tmp/flarum-release/release.zip
 
 cd /tmp/flarum-release
 unzip release.zip -d ./
 rm release.zip
 
+# Delete files
+rm -rf /tmp/flarum-release/build.sh
+rm -rf /tmp/flarum-release/Vagrantfile
+rm -rf /tmp/flarum-release/flarum/vagrant
+rm -rf /tmp/flarum-release/flarum/core
+rm -rf /tmp/flarum-release/flarum/studio.json
+
 # Install all Composer dependencies
-cd /tmp/flarum-release/system
+cd /tmp/flarum-release/flarum
 composer install --prefer-dist --optimize-autoloader --ignore-platform-reqs --no-dev
+composer config repositories.flarum git https://github.com/flarum/core-private.git
+composer require flarum/core:dev-master@dev --prefer-dist --update-no-dev
+
+# Copy public files
+cp -R /tmp/flarum-release/flarum/vendor/flarum/core/public/* /tmp/flarum-release/assets
 
 # Install frontend dependencies
-cd /tmp/flarum-release/system/vendor/flarum/core/js
+# Assumes: npm install -g gulp flarum-gulp
+cd /tmp/flarum-release/flarum/vendor/flarum/core/js
 bower install
 
-cd /tmp/flarum-release/system/vendor/flarum/core/js/forum
-npm install
-gulp
+for app in forum admin; do
+  cd "/tmp/flarum-release/flarum/vendor/flarum/core/js/${app}"
+  npm link gulp flarum-gulp babel-core
+  gulp --production
+  rm -rf "/tmp/flarum-release/flarum/vendor/flarum/core/js/${app}/node_modules"
+done
 
-cd /tmp/flarum-release/system/vendor/flarum/core/js/admin
-npm install
-gulp
+rm -rf /tmp/flarum-release/flarum/vendor/flarum/core/js/bower_components
 
+# Bundle extensions
+for extension in bbcode emoji likes lock markdown mentions pusher sticky subscriptions suspend tags; do
+  mkdir "/tmp/flarum-release/extensions/${extension}"
+  cd "${base}/extensions/${extension}"
+  git archive --format zip --worktree-attributes HEAD > "/tmp/flarum-release/extensions/${extension}/release.zip"
+
+  cd "/tmp/flarum-release/extensions/${extension}"
+  unzip release.zip -d ./
+  rm release.zip
+  composer install --prefer-dist --optimize-autoloader --ignore-platform-reqs --no-dev
+
+  cd "/tmp/flarum-release/extensions/${extension}/js"
+  bower install
+
+  for app in forum admin; do
+    cd "/tmp/flarum-release/extensions/${extension}/js"
+
+    if [ -d $app ]; then
+      cd $app
+      bower install
+      npm link gulp flarum-gulp
+      gulp --production
+      rm -rf node_modules bower_components
+    fi
+  done
+
+  rm -rf "/tmp/flarum-release/extensions/${extension}/js/bower_components"
+  wait
+done