diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 033495d..a7503a1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,7 +85,7 @@ ailab:
   tags:
     - ailab
   before_script:
-    - python3 -m venv $HOME/venv
+    - test -d $HOME/venv || python3 -m venv $HOME/venv
     - source $HOME/venv/bin/activate
     - pip install uv --index-url https://pypi.tuna.tsinghua.edu.cn/simple
     - export PATH="$HOME/venv/bin:$HOME/.local/bin:$PATH"
diff --git a/emblem5/ai/train2.py b/emblem5/ai/train2.py
old mode 100644
new mode 100755