diff --git a/.semaphore/semaphore.yml b/.semaphore/semaphore.yml
index b928b67..65cba7a 100644
--- a/.semaphore/semaphore.yml
+++ b/.semaphore/semaphore.yml
@@ -11,6 +11,7 @@ blocks:
         - name: docker build
           commands:
             - checkout
+            - 'git clone --recursive https://github.com/fcwu/docker-ubuntu-vnc-desktop'
             - docker build -t cloud9-ide-vdi .
             - '# Define Version Numbers'
             - DATE=$(date +%y%U)