[xwiki-users] Solving conflicting dependencies of Extensions

Hello, I'm testing installation of an extension with extension manager / extension repository, on XE 4.3-milestone-2: - deploy my extension (xar + deps) from maven to a local nexus - import this extension into the extension repo in my xwiki - try to install it with EM I get a conflict: Dependency [javax.jcr:jcr-2.0] is not compatible with core extension [javax.jcr:jcr-1.0] This dependency is a transitive dependency (runtime) of a mstor library needed by my app. Currently, it is used in xwiki in version 1.0. I first tried to add an <exclusion> block for it in my pom.xml, redeployed, reimported, reinstalled, with same result. I then added jcr 1.0 in a dependencyManagement section in order to override version 2.0 brought by mstor, but again with same result. BTW, additionally, the folder targeted by xwiki.data.dir remains empty ... Seems a bit strange. How can I solve this issue ? Thanks, Jeremie