diff --git a/sdk_container/src/third_party/coreos-overlay/metadata/md5-cache/sys-libs/timezone-data-2018e b/sdk_container/src/third_party/coreos-overlay/metadata/md5-cache/sys-libs/timezone-data-2018e
index d319c32207..41298f041f 100644
--- a/sdk_container/src/third_party/coreos-overlay/metadata/md5-cache/sys-libs/timezone-data-2018e
+++ b/sdk_container/src/third_party/coreos-overlay/metadata/md5-cache/sys-libs/timezone-data-2018e
@@ -1,4 +1,4 @@
-DEFINED_PHASES=compile config configure install postinst preinst prepare test
+DEFINED_PHASES=compile configure install prepare test
 DEPEND=nls? ( virtual/libintl )
 DESCRIPTION=Timezone data (/usr/share/zoneinfo) and utilities (tzselect/zic/zdump)
 EAPI=6
@@ -10,4 +10,4 @@ RDEPEND=nls? ( virtual/libintl ) !sys-libs/glibc[vanilla(+)]
 SLOT=0
 SRC_URI=http://www.iana.org/time-zones/repository/releases/tzdata2018e.tar.gz http://www.iana.org/time-zones/repository/releases/tzcode2018e.tar.gz
 _eclasses_=desktop	b1d22ac8bdd4679ab79c71aca235009d	epatch	a1bf4756dba418a7238f3be0cb010c54	estack	43ddf5aaffa7a8d0482df54d25a66a1f	eutils	6e6c2737b59a4b982de6fb3ecefd87f8	flag-o-matic	55aaa148741116aa54ad0d80e361818e	ltprune	08f9e1d9ee0af8f5d9a7854efbcd8c0e	multilib	b2f01ad412baf81650c23fcf0975fa33	preserve-libs	ef207dc62baddfddfd39a164d9797648	toolchain-funcs	f164325a2cdb5b3ea39311d483988861	vcs-clean	2a0f74a496fa2b1552c4f3398258b7bf
-_md5_=f232d6c6f6c2c38aa5d82991fa318711
+_md5_=151a11dcda86d01d9551c03c7294ea6f
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-libs/timezone-data/timezone-data-2018e.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-libs/timezone-data/timezone-data-2018e.ebuild
index 03e99a924b..3d123e34d9 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-libs/timezone-data/timezone-data-2018e.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/sys-libs/timezone-data/timezone-data-2018e.ebuild
@@ -91,79 +91,7 @@ src_install() {
 	# Delete man pages installed by man-pages package.
 	rm "${ED}"/usr/share/man/man5/tzfile.5* "${ED}"/usr/share/man/man8/{tzselect,zdump,zic}.8 || die
 	dodoc CONTRIBUTING README NEWS *.html
-}
-
-get_TIMEZONE() {
-	local tz src="${EROOT}etc/timezone"
-	if [[ -e ${src} ]] ; then
-		tz=$(sed -e 's:#.*::' -e 's:[[:space:]]*::g' -e '/^$/d' "${src}")
-	else
-		tz="FOOKABLOIE"
-	fi
-	[[ -z ${tz} ]] && return 1 || echo "${tz}"
-}
-
-pkg_preinst() {
-	local tz=$(get_TIMEZONE)
-	if [[ ${tz} == right/* || ${tz} == posix/* ]] ; then
-		eerror "The right & posix subdirs are no longer installed as subdirs -- they have been"
-		eerror "relocated to match upstream paths as sibling paths.  Further, posix/xxx is the"
-		eerror "same as xxx, so you should simply drop the posix/ prefix.  You also should not"
-		eerror "be using right/xxx for the system timezone as it breaks programs."
-		die "Please fix your timezone setting"
-	fi
-
-	# Trim the symlink by hand to avoid portage's automatic protection checks.
-	rm -f "${EROOT}"/usr/share/zoneinfo/posix
-
-	if has_version "<=${CATEGORY}/${PN}-2015c" ; then
-		elog "Support for accessing posix/ and right/ directly has been dropped to match"
-		elog "upstream.  There is no need to set TZ=posix/xxx as it is the same as TZ=xxx."
-		elog "For TZ=right/, you can use TZ=../zoneinfo-leaps/xxx instead.  See this post"
-		elog "for details: https://mm.icann.org/pipermail/tz/2015-February/022024.html"
-	fi
-}
-
-configure_tz_data() {
-	# make sure the /etc/localtime file does not get stale #127899
-	local tz src="${EROOT}etc/timezone" etc_lt="${EROOT}etc/localtime"
-
-	# If it's a symlink, assume the user knows what they're doing and
-	# they're managing it themselves. #511474
-	if [[ -L ${etc_lt} ]] ; then
-		einfo "Assuming your ${etc_lt} symlink is what you want; skipping update."
-		return 0
-	fi
-
-	if ! tz=$(get_TIMEZONE) ; then
-		einfo "Assuming your empty ${etc_lt} file is what you want; skipping update."
-		return 0
-	fi
-	if [[ ${tz} == "FOOKABLOIE" ]] ; then
-		elog "You do not have TIMEZONE set in ${src}."
-
-		if [[ ! -e ${etc_lt} ]] ; then
-			cp -f "${EROOT}"/usr/share/zoneinfo/Factory "${etc_lt}"
-			elog "Setting ${etc_lt} to Factory."
-		else
-			elog "Skipping auto-update of ${etc_lt}."
-		fi
-		return 0
-	fi
-
-	if [[ ! -e ${EROOT}/usr/share/zoneinfo/${tz} ]] ; then
-		elog "You have an invalid TIMEZONE setting in ${src}"
-		elog "Your ${etc_lt} has been reset to Factory; enjoy!"
-		tz="Factory"
-	fi
-	einfo "Updating ${etc_lt} with ${EROOT}usr/share/zoneinfo/${tz}"
-	cp -f "${EROOT}"/usr/share/zoneinfo/"${tz}" "${etc_lt}"
-}
-
-pkg_config() {
-	configure_tz_data
-}
-
-pkg_postinst() {
-	configure_tz_data
+
+	# install the symlink by hand to not break existing timezones
+	dosym . /usr/share/zoneinfo/posix
 }