diff --git a/src/10_pack_rootfs.sh b/src/10_pack_rootfs.sh
index 3ce688866..b06f2f09c 100755
--- a/src/10_pack_rootfs.sh
+++ b/src/10_pack_rootfs.sh
@@ -10,7 +10,7 @@ cd work
 echo "Packing initramfs. This may take a while..."
 
 # Remove the old 'initramfs' archive if it exists.
-rm -f rootfs.cpio.gz
+rm -f rootfs.cpio.xz
 
 cd rootfs