* Adding group 'hsqldb' to your system ...
 *  - Groupid: next available
 * Adding user 'hsqldb' to your system ...
 *  - Userid: 104
 *  - Shell: /bin/sh
 *  - Home: /dev/null
 *  - Groups: hsqldb
!!! ERROR: Unable to determine valid vm. Please see http://www.gentoo.org/doc/en/java.xml#doc_chap4
 * Unable to determine VM for building from dependencies:
NV_DEPEND: java6? ( >=virtual/jdk-1.6 )
	!java6? ( || ( =virtual/jdk-1.5* =virtual/jdk-1.4* ) )
	test? ( dev-java/junit:0 )
	app-arch/unzip
	java-virtuals/servlet-api:2.3  >=dev-java/java-config-2.1.6 >=sys-apps/portage-2.1.2.7 source? ( app-arch/zip )  >=dev-java/ant-core-1.7.0
	
	>=sys-apps/portage-2.1.2.7
	>=dev-java/javatoolkit-0.3.0-r2
 * 
 * ERROR: dev-db/hsqldb-1.8.0.10 failed.
 * Call stack:
 *                ebuild.sh, line   49:  Called pkg_setup
 *   hsqldb-1.8.0.10.ebuild, line   40:  Called java-pkg-2_pkg_setup
 *        java-pkg-2.eclass, line   61:  Called java-pkg_init
 *      java-utils-2.eclass, line 2054:  Called java-pkg_switch-vm
 *      java-utils-2.eclass, line 2472:  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-db/hsqldb-1.8.0.10/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-db/hsqldb-1.8.0.10/temp/die.env'.
 * 
!!! 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