thesource@localhost ~ $ sudo  emerge limewire
Password:
Calculating dependencies... done!
>>> Verifying ebuild Manifests...
>>> starting parallel fetching

>>> Emerging (1 of 2) dev-java/icu4j-3.0-r1 to /
 * icu4jsrc_3_0.jar RMD160 SHA1 SHA256 size ;-) ...                       [ ok ]
 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking icu4jsrc_3_0.jar ;-) ...                                      [ ok ]
 * Using: sun-jdk-1.6
>>> Unpacking source...
* Home for VM 'sun-jdk-1.6' does not exist: /usr/lib/jvm/sun-jdk-1.6/
* Invalid value for GENTOO_VM: sun-jdk-1.6
 * 
 * ERROR: dev-java/icu4j-3.0-r1 failed.
 * Call stack:
 *             ebuild.sh, line 1701:  Called dyn_unpack
 *             ebuild.sh, line  817:  Called qa_call 'src_unpack'
 *             ebuild.sh, line   44:  Called src_unpack
 *   icu4j-3.0-r1.ebuild, line   25:  Called die
 * The specific snippet of code:
 *      jar -xf ${DISTDIR}/${PN}src_${MY_PV}.jar || die "failed to unpack"
 *  The die message:
 *   failed to unpack
 * 
 * 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/icu4j-3.0-r1/temp/build.log'.
 * 
!!! When you file a bug report, please include the following information:
GENTOO_VM=sun-jdk-1.6  CLASSPATH="." JAVA_HOME="/opt/sun-jdk-1.6.0.02"
JAVACFLAGS="-source 1.4 -target 1.4" COMPILER=""
and of course, the output of emerge --info

 * Messages for package dev-java/icu4j-3.0-r1:

 * 
 * ERROR: dev-java/icu4j-3.0-r1 failed.
 * Call stack:
 *             ebuild.sh, line 1701:  Called dyn_unpack
 *             ebuild.sh, line  817:  Called qa_call 'src_unpack'
 *             ebuild.sh, line   44:  Called src_unpack
 *   icu4j-3.0-r1.ebuild, line   25:  Called die
 * The specific snippet of code:
 *      jar -xf ${DISTDIR}/${PN}src_${MY_PV}.jar || die "failed to unpack"
 *  The die message:
 *   failed to unpack
 * 
 * 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/icu4j-3.0-r1/temp/build.log'.
 * 
thesource@localhost ~ $