--- portage-2.2_rc20-orig/bin/ebuild.sh	2008-12-29 18:13:33 +0900
+++ portage-2.2_rc20/bin/ebuild.sh	2008-12-29 18:14:19 +0900
@@ -690,6 +690,15 @@
 	cd "${WORKDIR}" || die "Directory change failed: \`cd '${WORKDIR}'\`"
 	vecho ">>> Unpacking source..."
 	ebuild_phase src_unpack
+	if [ -n "${PORTAGE_PATCHDIR}" -a -d "${PORTAGE_PATCHDIR}/${CATEGORY}/${PN}" ]; then
+		vecho ">>> Applying custom patches..."
+		[ "$(type -t epatch)" == "function" ] || qa_source "${PORTDIR}/eclass/eutils.eclass"
+		for patch in "${PORTAGE_PATCHDIR}/${CATEGORY}/${PN}"/* \
+                             "${PORTAGE_PATCHDIR}/${CATEGORY}/${PN}/${PV}"/*; do
+			[ -f "${patch}" ] || continue
+			epatch "${patch}" || die "Failed to apply patch ${patch}"
+		done
+	fi
 	touch "${PORTAGE_BUILDDIR}/.unpacked" || die "IO Failure -- Failed 'touch .unpacked' in ${PORTAGE_BUILDDIR}"
 	vecho ">>> Source unpacked."
 	cd "${PORTAGE_BUILDDIR}"