diff --git a/sbin/gentoo-upgrade.sh b/sbin/gentoo-upgrade.sh
index eb8cee1..2cd3d09 100755
--- a/sbin/gentoo-upgrade.sh
+++ b/sbin/gentoo-upgrade.sh
@@ -232,7 +232,7 @@ if [ $STAGE_CNT -eq $STAGE ]; then
         echo "======= STAGE $STAGE: 1'th toolchain build ======="
 
         if [ -f /etc/portage/need_libtool_rebuild ]; then
-                emerge -1vq sys-devel/libtool
+                emerge -1vq dev-build/libtool
                 rm /etc/portage/need_libtool_rebuild
                 [ 0 -ne $? ] && echo "Stage $STAGE: cann't remove /etc/portage/need_libtool_rebuild ;-( =======" && exit $STAGE
         fi
@@ -249,7 +249,7 @@ if [ $STAGE_CNT -eq $STAGE ]; then
 
                 # first toolchain build
                 emerge -1uvq sys-kernel/linux-headers sys-libs/glibc sys-devel/binutils \
-                          sys-devel/gcc-config sys-devel/gcc sys-devel/binutils-config sys-devel/libtool
+                          sys-devel/gcc-config sys-devel/gcc sys-devel/binutils-config dev-build/libtool
                 [ 0 -ne $? ] && echo "Stage $STAGE: 1'th toolchain build failed ;-( =======" && exit $STAGE
                 rm /etc/portage/need_toolchain_rebuild
                 [ 0 -ne $? ] && echo "Stage $STAGE: cann't remove /etc/portage/need_toolchain_rebuild ;-( =======" && exit $STAGE