LenovoW510 ~ # emerge --info '=dev-java/jsch-0.1.49'
Portage 2.1.11.63 (default/linux/amd64/13.0/desktop, gcc-4.7.2, glibc-2.17, 3.8.11-gentoo x86_64)
=================================================================
                        System Settings
=================================================================
System uname: Linux-3.8.11-gentoo-x86_64-Intel-R-_Core-TM-_i7_CPU_Q_720_@_1.60GHz-with-gentoo-2.2
KiB Mem:    16367428 total,  12004384 free
KiB Swap:    8388604 total,   8388604 free
Timestamp of tree: Tue, 07 May 2013 06:45:01 +0000
ld GNU ld (GNU Binutils) 2.23.1
app-shells/bash:          4.2_p45
dev-java/java-config:     2.2.0
dev-lang/python:          2.7.4, 3.2.4
dev-util/cmake:           2.8.10.2-r2
dev-util/pkgconfig:       0.28
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.11.8
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.11.6, 1.12.6, 1.13.1
sys-devel/binutils:       2.23.1
sys-devel/gcc:            4.6.4, 4.7.2-r1
sys-devel/gcc-config:     1.8
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.8 (virtual/os-headers)
sys-libs/glibc:           2.17
Repositories: gentoo science voyageur
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=corei7 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.4/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=corei7 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo http://gentoo.osuosl.org"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j9"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/science /var/lib/layman/voyageur"
SYNC="rsync://rsync.us.gentoo.org/gentoo-portage"
USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus dri dts dvd dvdr emboss encode exif fam firefox flac fortran gdbm gif gpm gtk iconv ipv6 jpeg lcms ldap libnotify mad mmx mng modules mp3 mp4 mpeg mudflap multilib ncurses nls nptl nvidia ogg opengl openmp pam pango pcre pdf png policykit ppds qt3support qt4 readline sdl session spell sse sse2 sse3 sse4_1 sse4_2 ssl ssse3 startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xcb xml xv xvid xvmc zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" NGINX_MODULES_MAIL="imap smtp" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby19" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

LenovoW510 ~ # emerge -pqv '=dev-java/jsch-0.1.49'
[ebuild     U ] dev-java/jsch-0.1.49 [0.1.44] USE="zlib -doc -examples -source" 

Build log (/var/tmp/portage/dev-java/jsch-0.1.49/temp/build.log):
 * Package:    dev-java/jsch-0.1.49
 * Repository: gentoo
 * Maintainer: java@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux multilib userland_GNU zlib
 * FEATURES:   sandbox splitdebug
Usage: depend-java-query [options]

depend-java-query: error: no such option: --get-vm
 * Unable to determine VM for building from dependencies:
NV_DEPEND: >=virtual/jdk-1.5
	app-arch/unzip
	>=virtual/jdk-1.5
	zlib? ( dev-java/jzlib:0 ) >=dev-java/java-config-2.1.9-r1  source? ( app-arch/zip )  >=dev-java/ant-core-1.8.2
	   
	   
	   >=dev-java/javatoolkit-0.3.0-r2
	   >=dev-lang/python-2.4
 * ERROR: dev-java/jsch-0.1.49 failed (setup phase):
 *   Failed to determine VM for building.
 * 
 * Call stack:
 *             ebuild.sh, line   93:  Called pkg_setup
 *             ebuild.sh, line  326:  Called java-pkg-2_pkg_setup
 *     java-pkg-2.eclass, line   53:  Called java-pkg_init
 *   java-utils-2.eclass, line 2187:  Called java-pkg_switch-vm
 *   java-utils-2.eclass, line 2671:  Called die
 * The specific snippet of code:
 *   					die "Failed to determine VM for building."
 * 
 * If you need support, post the output of `emerge --info '=dev-java/jsch-0.1.49'`,
 * the complete build log and the output of `emerge -pqv '=dev-java/jsch-0.1.49'`.
!!! 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 =jsch-0.1.49
 * The complete build log is located at '/var/tmp/portage/dev-java/jsch-0.1.49/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-java/jsch-0.1.49/temp/die.env'.
 * Working directory: '/var/tmp/portage/dev-java/jsch-0.1.49'
 * S: '/var/tmp/portage/dev-java/jsch-0.1.49/work/jsch-0.1.49'