[galaxy-user] tool_path

Hi, I have read the exchange betwen you and Florent Angly about "Problem with new tool shed" and I have a problem with Nebula Tools: http://nebula.curie.fr/. At the Pasteur Institute, we have 4 galaxy instances and I would like to use a local tool shed instance for Nebula installation. However, the nebula has tools with hard-coded path tool but I don't want hard-coded this so do you have a solution to add a thing like this ${tool.install_dir} in the xml? Thank you for your answer. Best Regards, Fabien Mareuil