diff --git a/build-ext.sh b/build-ext.sh
index f618a498..1e5d108e 100644
--- a/build-ext.sh
+++ b/build-ext.sh
@@ -1,5 +1,7 @@
 echo "🛠  Installing dependencies."
 yarn
+echo "🛠  Building internal packages."
+yarn lerna run build --scope @stacks/connect-ui
 echo "🛠  Compiling extension."
 yarn lerna run prod:ext
 echo "🛠  Packaging Browser Extension"