Compilation error when building WebServices against Luna TP

[INFO] Resolving dependencies of MavenProject: org.jboss.tools.ws.plugins:org.jboss.tools.ws.creation.core:1.6.0-SNAPSHOT @ /Users/xcoulon/code/jbosstools/jbosstools-webservices/plugins/org.jboss.tools.ws.creation.core/pom.xml
[INFO] Cannot complete the request.  Generating details.
[INFO] Cannot complete the request.  Generating details.
[INFO] {osgi.ws=cocoa, osgi.os=macosx, osgi.arch=x86, org.eclipse.update.install.features=true}
[ERROR] Cannot resolve project dependencies:
[ERROR]   Software being installed: org.jboss.tools.ws.creation.core 1.6.0.qualifier
[ERROR]   Missing requirement: org.jboss.tools.ws.creation.core 1.6.0.qualifier requires 'bundle org.apache.ant [1.8.2,1.9.0)' but it could not be found
[ERROR]
[ERROR] Internal error: java.lang.RuntimeException: No solution found because the problem is unsatisfiable.: [Unable to satisfy dependency from org.jboss.tools.ws.creation.core 1.6.0.qualifier to bundle org.apache.ant [1.8.2,1.9.0).; No solution found because the problem is unsatisfiable.] -> [Help 1]
org.apache.maven.InternalErrorException: Internal error: java.lang.RuntimeException: No solution found because the problem is unsatisfiable.: [Unable to satisfy dependency from org.jboss.tools.ws.creation.core 1.6.0.qualifier to bundle org.apache.ant [1.8.2,1.9.0).; No solution found because the problem is unsatisfiable.]