diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index de3b9fe93..867001f46 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -118,6 +118,14 @@ jobs:
           # Defaults to the user or organization that owns the workflow file
           scope: "@RaspberryPiFoundation"
 
+      - name: Install scratch-gui code
+        run: yarn install --immutable
+        working-directory: scratch
+
+      - name: Build scratch-gui
+        run: yarn build
+        working-directory: scratch
+
       - name: Install code
         run: yarn install --immutable
         env: