1 files changed, 9 insertions, 2 deletions

diff --git a/src/parted-usb.sh b/src/parted-usb.sh
index 67e9593..62f9dd2 100755
--- a/src/parted-usb.sh
+++ b/src/parted-usb.sh
@@ -216,9 +216,16 @@ boot_vm()
 . samizdat-paths.sh || die 'samizdat-paths.sh not found'
 samizdat_linux_dir=/boot
 
+DEFAULT_ROOTFS=rootfs/samizdat-gold.seed.btrfs
+#DEFAULT_PATCHFS=rootfs/samizdat.patch.btrfs
 
-[ "$ROOTFS" ] || ROOTFS=rootfs/samizdat-gold.seed.btrfs
-#PATCHFS=rootfs/samizdat.patch.btrfs
+if [ "$ROOTFS" ]
+then
+  [ -f "$ROOTFS" ] || die "Not a file: $ROOTFS"
+elif [ -f "$DEFAULT_ROOTFS" ]
+then
+  ROOTFS=$DEFAULT_ROOTFS
+fi
 
 if [ ! "$GPG_INPUT_DIR" ]
 then