diff --git a/ci/ci.sh b/ci/ci.sh
index 5928d3b3a..a57622dea 100755
--- a/ci/ci.sh
+++ b/ci/ci.sh
@@ -149,7 +149,7 @@ prepare_docker() {
     COPY ./*.whl /
     EXPOSE 8000
     EXPOSE 10001
-    RUN pip install /$wheel[serve]
+    RUN pip install /${wheel}[serve]
     RUN sudo apt update && sudo apt install curl -y
     " > $tmp_dir/Dockerfile