How to customize the location for file-store persistance in RHDG

Issue

• Is it possible to store the files of a file-store in a custom location?
• The file-store element "relative-to" not working as expected and throw an Exception during server start

ERROR [org.jboss.msc.service.fail] (MSC service thread 1-8) MSC000001: Failed to start service jboss.datagrid-infinispan.clustered.wolf.config: org.jboss.msc.service.StartException in service jboss.datagrid-infinispan.clustered.wolf.config: Failed to start service
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1730)
    at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1558)
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1364)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: WFLYCTL0256: Could not find a path called '/MyCacheStore'
    at org.jboss.as.controller.services.path.PathManagerService.resolveRelativePathEntry(PathManagerService.java:110)
    at org.jboss.as.clustering.infinispan.subsystem.CacheConfigurationAdd$5.inject(CacheConfigurationAdd.java:765)
    at org.jboss.as.clustering.infinispan.subsystem.CacheConfigurationAdd$5.inject(CacheConfigurationAdd.java:760)
    at org.jboss.msc.inject.CastingInjector.inject(CastingInjector.java:58)
    at org.jboss.msc.service.ServiceControllerImpl.inject(ServiceControllerImpl.java:1517)
    at org.jboss.msc.service.ServiceControllerImpl.inject(ServiceControllerImpl.java:1503)
    at org.jboss.msc.service.ServiceControllerImpl.access$2800(ServiceControllerImpl.java:55)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1699)
    ... 6 more