diff --git a/tools/catalyst-auto-ppc.conf b/tools/catalyst-auto-ppc.conf
index 71a4e840..c5d09d09 100644
--- a/tools/catalyst-auto-ppc.conf
+++ b/tools/catalyst-auto-ppc.conf
@@ -26,9 +26,9 @@ give_latest_from_dates() {
 
 # Replace the date/time stamp in the filename to "latest".
 # Forms we handle:
-# stage3-xxx-2018.0.tar.bz2
-# stage3-xxx-20180116.tar.bz2
-# stage3-xxx-20180116T015819Z.tar.bz2
+# stage3-xxx-2018.0.tar.xz
+# stage3-xxx-20180116.tar.xz
+# stage3-xxx-20180116T015819Z.tar.xz
 convert_filename() {
 	sed -E 's:-20[0-9]+(\.[0-9]+|T[0-9]+Z)?:-latest:g'
 }
@@ -38,7 +38,7 @@ update_symlinks() {
 	local d f
 	for d in "${BUILD_SRCDIR_BASE}/builds/default/ppc" ; do
 		pushd "${d}" >/dev/null
-		for f in $(ls stage3-ppc-*bz2 | grep -v latest | give_latest_from_dates) ; do
+		for f in $(ls stage3-ppc-*xz | grep -v latest | give_latest_from_dates) ; do
 			local of=$(echo "${f}" | convert_filename)
 			ln -sf "${f}" "${of}"
 		done
@@ -57,7 +57,7 @@ post_build() {
 
 	case ${spec} in
 	stage3.spec)
-		upload stage3-ppc-*${TIMESTAMP}*.bz2*
+		upload stage3-ppc-*${TIMESTAMP}*.xz*
 		;;
 	esac
 
diff --git a/tools/catalyst-auto-ppc64.conf b/tools/catalyst-auto-ppc64.conf
index bb4d50d0..ce5aa5c8 100644
--- a/tools/catalyst-auto-ppc64.conf
+++ b/tools/catalyst-auto-ppc64.conf
@@ -27,9 +27,9 @@ give_latest_from_dates() {
 
 # Replace the date/time stamp in the filename to "latest".
 # Forms we handle:
-# stage3-xxx-2018.0.tar.bz2
-# stage3-xxx-20180116.tar.bz2
-# stage3-xxx-20180116T015819Z.tar.bz2
+# stage3-xxx-2018.0.tar.xz
+# stage3-xxx-20180116.tar.xz
+# stage3-xxx-20180116T015819Z.tar.xz
 convert_filename() {
 	sed -E 's:-20[0-9]+(\.[0-9]+|T[0-9]+Z)?:-latest:g'
 }
@@ -40,7 +40,7 @@ update_symlinks() {
 	for d in "${BUILD_SRCDIR_BASE}/builds/default/ppc64" ; do
 		pushd "${d}" >/dev/null
 		for t in ppc64; do
-			for f in $(ls stage3-${t}-*bz2 | grep -v latest | give_latest_from_dates) ; do
+			for f in $(ls stage3-${t}-*xz | grep -v latest | give_latest_from_dates) ; do
 				local of=$(echo "${f}" | convert_filename)
 				ln -sf "${f}" "${of}"
 			done
@@ -63,7 +63,7 @@ post_build() {
 		upload *${TIMESTAMP}*.iso*
 		;;
 	stage3*.spec)
-		upload stage3-ppc64-*${TIMESTAMP}*.bz2*
+		upload stage3-ppc64-*${TIMESTAMP}*.xz*
 		;;
 	esac