Custom sandbox location for plugins

Hi,

I'm working on two different plugins at the same time and I'd love to have a separate sandbox for their testing. I noticed that when running the plugin new instance of Idea gets executed with parameters -Didea.config.path etc pointing to a sandbox directory. It is possible to change this sandbox per project or per 'Run configuration'?

I tried adding those options to 'Run/Debug Configuration', but they get overriden.

Thanks