Your package is runtime-depending on sys-devel/libtool standing to http://tinderbox.dev.gentoo.org/misc/rindex/sys-devel/libtool . sys-devel/libtool is a tool used almost always at build-time, (it's either a build system or a generator - sorry this is a generic template I start with so I can't tell you right away which one). This means that it should only be depended at build-time. Please correct your ebuild or document why it is used as a runtime-dependency so that it will not be suspected again. Thanks, Diego
http://sources.gentoo.org/viewcvs.py/gentoo-x86/net-libs/libesmtp/libesmtp-1.0.4.ebuild?r1=1.12&r2=1.13