# emerge -uDv world
Calculating world dependencies ...done!
>>> emerge (1 of 46) x11-terms/xterm-200-r3 to /
>>> md5 files   ;-) xterm-200-r1.ebuild
>>> md5 files   ;-) xterm-202-r2.ebuild
>>> md5 files   ;-) xterm-200-r3.ebuild
>>> md5 files   ;-) xterm-202-r1.ebuild
>>> md5 files   ;-) ChangeLog
>>> md5 files   ;-) metadata.xml
>>> md5 files   ;-) files/xterm-no-toolbar-by-default.patch
>>> md5 files   ;-) files/digest-xterm-200-r1
>>> md5 files   ;-) files/digest-xterm-200-r3
>>> md5 files   ;-) files/digest-xterm-202-r1
>>> md5 files   ;-) files/digest-xterm-202-r2
>>> md5 src_uri ;-) xterm-200.tgz
>>> Unpacking source...
>>> Unpacking xterm-200.tgz to /var/tmp/portage/xterm-200-r3/work
>>> Source unpacked.
 * econf: updating xterm-200/config.guess with /usr/share/gnuconfig/config.guess
 * econf: updating xterm-200/config.sub with /usr/share/gnuconfig/config.sub
./configure --prefix=/usr --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --libdir=/etc --with-x --with-utempter --disable-setuid --disable-full-tgetent --disable-imake --enable-ansi-color --enable-88-color --enable-256-color --enable-broken-osc --enable-broken-st --enable-load-vt-fonts --enable-i18n --enable-wide-chars --enable-doublechars --enable-warnings --enable-tcap-query --enable-logging --enable-dabbrev --enable-freetype --enable-luit --enable-mini-luit --without-Xaw3d --disable-toolbar
configure: error: x: invalid package name

!!! ERROR: x11-terms/xterm-200-r3 failed.
!!! Function econf, Line 485, Exitcode 0
!!! econf failed
!!! If you need support, post the topmost build error, NOT this status message.