Traceback (most recent call last):
  File "/usr/bin/depend-java-query", line 13, in <module>
    from java_config.EnvironmentManager import EnvironmentManager
  File "/usr/share/java-config-2/pym/java_config/EnvironmentManager.py", line 444, in <module>
    EnvironmentManager = EnvironmentManager()
  File "/usr/share/java-config-2/pym/java_config/EnvironmentManager.py", line 35, in __init__
    self.load_active_vm()
  File "/usr/share/java-config-2/pym/java_config/EnvironmentManager.py", line 103, in load_active_vm
    raise InvalidVMError
java_config.Errors.InvalidVMError
 * Unable to determine VM for building from dependencies:
NV_DEPEND: >=virtual/jdk-1.3
	mono? ( dev-lang/mono )
	python? ( dev-lang/python )
	script? ( !dev-util/pccts )
	source? ( app-arch/zip )  >=dev-java/java-config-2.0.33-r1 >=sys-apps/portage-2.1.2.7 virtual/python
VNEED: 
 * 
 * ERROR: dev-java/antlr-2.7.7 failed.
 * Call stack:
 *             ebuild.sh, line 1703:  Called dyn_setup
 *             ebuild.sh, line  754:  Called qa_call 'pkg_setup'
 *             ebuild.sh, line   44:  Called pkg_setup
 *             ebuild.sh, line 1369:  Called java-pkg-2_pkg_setup
 *     java-pkg-2.eclass, line   55:  Called java-pkg_init
 *   java-utils-2.eclass, line 2083:  Called java-pkg_switch-vm
 *   java-utils-2.eclass, line 2501:  Called die
 * The specific snippet of code:
 *   				die "Failed to determine VM for building."
 *  The die message:
 *   Failed to determine VM for building.
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-java/antlr-2.7.7/temp/build.log'.
 * 
!!! When you file a bug report, please include the following information:
GENTOO_VM=  CLASSPATH="." JAVA_HOME=""
JAVACFLAGS="" COMPILER=""
and of course, the output of emerge --info