Generator ant task requires to be run in the same directory as all WSDL files

When using the Generator ant task on a service that is defined in multiple files (for an example, look at the attached file), the build script has to be in the same directory as the WSDL/XSD files. Otherwise, the task cannot resolve any imports. It would be nice if the same directory that is defined in the wsdl attribute in the task is also used as the default directory for imports.