if (bld != null) {
if(bld.isInternalBuilder()){
IConfiguration prefCfg =
ManagedBuildManager.getPreferenceConfiguration(false);
IBuilder prefBuilder = prefCfg.getBuilder();
cfg.changeBuilder(
prefBuilder,
ManagedBuildManager.calculateChildId(cfg.getId(), null),
prefBuilder.getName());
bld = cfg.getEditableBuilder();
bld.setBuildPath(null);