diff --git a/docker/files/start.sh b/docker/files/start.sh
index 42c3f9b199..5ad6d84c85 100755
--- a/docker/files/start.sh
+++ b/docker/files/start.sh
@@ -5,7 +5,7 @@ tmux -2 new-session -d -s uxbox
 tmux new-window -t uxbox:1 -n 'figwheel'
 tmux select-window -t uxbox:1
 tmux send-keys -t uxbox 'cd uxbox/frontend' enter C-l
-tmux send-keys -t uxbox "sed -i -e 's/\"uxbox.config.url\" \".*\"/\"uxbox.config.url\" \"${API_URL}\"/g' figwheel.clj" enter C-l
+tmux send-keys -t uxbox "sed -i -e 's/\"uxbox.config.url\" \".*\"/\"uxbox.config.url\" \"${UXBOX_CONFIG_URL}\"/g' figwheel.clj" enter C-l
 tmux send-keys -t uxbox 'npm run figwheel' enter
 
 tmux new-window -t uxbox:2 -n 'backend'