diff --git a/prepare-root.sh b/prepare-root.sh
index eef5d6c..7774430 100755
--- a/prepare-root.sh
+++ b/prepare-root.sh
@@ -899,6 +899,7 @@ if ! [[ $EFISTUB ]]; then
     fi
 fi
 
+[[ -e "$OUTDIR" ]] && rm -fr "$OUTDIR"
 mkdir -p "$OUTDIR"
 mv "$MY_TMPDIR"/root.img \
    "$sysroot"/usr/efi \