Index: release/Makefile
===================================================================
--- release/Makefile
+++ release/Makefile
@@ -161,15 +161,16 @@
 src.txz:
 	mkdir -p ${DISTDIR}/usr
 	ln -fs ${WORLDDIR} ${DISTDIR}/usr/src
-	( cd ${DISTDIR} && ${TAR_CMD} cLvf - --exclude .svn --exclude .zfs \
-	    --exclude .git --exclude @ --exclude usr/src/release/dist \
+	( set -o pipefail && cd ${DISTDIR} && ${TAR_CMD} cLvf - \
+	    --exclude .svn --exclude .zfs --exclude .git --exclude @ \
+	    --exclude usr/src/release/dist \
 	    --exclude usr/src/release/obj usr/src | \
 	    ${XZ_CMD} > ${.OBJDIR}/src.txz )
 
 ports.txz:
 	mkdir -p ${DISTDIR}/usr
 	ln -fs ${PORTSDIR} ${DISTDIR}/usr/ports
-	( cd ${DISTDIR} && ${TAR_CMD} cLvf - \
+	( set -o pipefail && cd ${DISTDIR} && ${TAR_CMD} cLvf - \
 	    --exclude .git --exclude .svn \
 	    --exclude usr/ports/distfiles --exclude usr/ports/packages \
 	    --exclude 'usr/ports/INDEX*' --exclude work usr/ports | \