Typically, the contents of the home directory is not copied when a derived project is created. This means that any data that should be shared needs to be in the /cloud/project directory. This is because the home directory could contain sensitive information in many cases (SSH keys, etc).
Here is a little more info on how this works:
In your case, I would look into if its possible to change the location of your virtualenv to a path under the /cloud/project directory.