I'm sorry, I must have misunderstood you. They are both trying to use venv from the cache. Let's say I need to run 10 identical nodes at the same time. The necessary ven is already in the cache. They are independent of each other, but have the same set of libraries. This venv from the cache is suitable for all of them. But only 1 node will copy it. Everyone else will start doing exactly the same venv, as if it is not in the cache.