diff -urN ../portage-2.1.3.16-orig/bin/ebuild.sh bin/ebuild.sh
--- ../portage-2.1.3.16-orig/bin/ebuild.sh	2007-10-23 05:33:20 +0900
+++ bin/ebuild.sh	2007-12-23 19:19:00 +0900
@@ -809,6 +809,22 @@
 	cd "${WORKDIR}" || die "Directory change failed: \`cd '${WORKDIR}'\`"
 	vecho ">>> Unpacking source..."
 	qa_call src_unpack
+	if [ -n "${PORTAGE_PATCHDIR}" -a -d "${PORTAGE_PATCHDIR}/${CATEGORY}/${PN}" ]; then
+		vecho ">>> Applying custom patches..."
+		if [ "$(type -t epatch)" != "function" ]; then
+			epatch() {
+				for level in 0 1 2 3 4; do
+					patch -p$level <"$1" && return 0
+				done
+				return $?
+			}
+		fi
+		for patch in "${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}"