$ emerge plexus-ftp -vt

 * IMPORTANT: 5 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.


These are the packages that would be merged, in reverse order:

Calculating dependencies... done!
[ebuild   R   ] dev-java/plexus-ftp-1.0_alpha1  USE="doc source" 0 kB [1]

Total: 1 package (1 reinstall), Size of downloads: 0 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /usr/local/portage/gsoc-maven-overlay


>>> Verifying ebuild manifests

>>> Emerging (1 of 1) dev-java/plexus-ftp-1.0_alpha1 from gsoc-maven-overlay
 * plexus-ftp-1.0_alpha1.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...                                                                                                [ ok ]
 * Package:    dev-java/plexus-ftp-1.0_alpha1
 * Repository: gsoc-maven-overlay
 * Maintainer: java@gentoo.org
 * USE:        consolekit doc elibc_glibc kernel_linux policykit source test userland_GNU x86
 * FEATURES:   sandbox test
 * Using: sun-jdk-1.6
>>> Unpacking source...
>>> Unpacking plexus-ftp-1.0_alpha1.tar.bz2 to /var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work
!!! ERROR: Package avalon-framework was not found!
 * ERROR: dev-java/plexus-ftp-1.0_alpha1 failed (unpack phase):
 *   java-config --classpath=avalon-framework failed
 *
 * Call stack:
 *     ebuild.sh, line   56:  Called src_unpack
 *   environment, line 4693:  Called java-maven-2_src_unpack
 *   environment, line 2688:  Called java-maven-2_rewrite_poms '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1/pom.xml' '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1/release-pom.xml'
 *   environment, line 2495:  Called java-pkg_getjars 'avalon-framework'
 *   environment, line 3439:  Called die
 * The specific snippet of code:
 *       [[ $? != 0 ]] && die "java-config --classpath=${pkgs} failed";
 *
 * If you need support, post the output of 'emerge --info =dev-java/plexus-ftp-1.0_alpha1',
 * the complete build log and the output of 'emerge -pqv =dev-java/plexus-ftp-1.0_alpha1'.
 * This ebuild used the following eclasses from overlays:
 *   /home/kasun/gentoo-sources/java/gsoc-maven-overlay/eclass/java-maven-2.eclass
 * This ebuild is from an overlay named 'gsoc-maven-overlay': '/home/kasun/gentoo-sources/java/gsoc-maven-overlay/'
!!! When you file a bug report, please include the following information:
GENTOO_VM=sun-jdk-1.6  CLASSPATH="" JAVA_HOME="/opt/sun-jdk-1.6.0.25"
JAVACFLAGS="-source 1.4 -target 1.4" COMPILER=""
and of course, the output of emerge --info
 * The complete build log is located at '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/temp/environment'.
 * S: '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1'

>>> Failed to emerge dev-java/plexus-ftp-1.0_alpha1, Log file:

>>>  '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/temp/build.log'

 * Messages for package dev-java/plexus-ftp-1.0_alpha1:

 * ERROR: dev-java/plexus-ftp-1.0_alpha1 failed (unpack phase):
 *   java-config --classpath=avalon-framework failed
 *
 * Call stack:
 *     ebuild.sh, line   56:  Called src_unpack
 *   environment, line 4693:  Called java-maven-2_src_unpack
 *   environment, line 2688:  Called java-maven-2_rewrite_poms '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1/pom.xml' '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1/release-pom.xml'
 *   environment, line 2495:  Called java-pkg_getjars 'avalon-framework'
 *   environment, line 3439:  Called die
 * The specific snippet of code:
 *       [[ $? != 0 ]] && die "java-config --classpath=${pkgs} failed";
 *
 * If you need support, post the output of 'emerge --info =dev-java/plexus-ftp-1.0_alpha1',
 * the complete build log and the output of 'emerge -pqv =dev-java/plexus-ftp-1.0_alpha1'.
 * This ebuild used the following eclasses from overlays:
 *   /home/kasun/gentoo-sources/java/gsoc-maven-overlay/eclass/java-maven-2.eclass
 * This ebuild is from an overlay named 'gsoc-maven-overlay': '/home/kasun/gentoo-sources/java/gsoc-maven-overlay/'
 * The complete build log is located at '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/temp/environment'.
 * S: '/var/tmp/portage/dev-java/plexus-ftp-1.0_alpha1/work/plexus-ftp-1.0_alpha1'

 * IMPORTANT: 5 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.