Revert "Revert "doc: script name""

This reverts commit a85d35e333.

headless.apkovl.tar.gz.sha512

@@ -1 +1 @@
-36892e9aa76807941602160ff62948c8953eefa36f9b386a0c7302fc46710b473a3e14b7eaf223a1ae6ac6454a839c78049c311fdbd50a204b2a011cb8faa474  headless.apkovl.tar.gz
+3f0d72d4cbdcffb87a51605bcb17cc9b2d993298ce854f5e752703bf513f1bea88976ae76e8d6ab460d3663a91e3fc6f42153bb1e5c31470a373f5bf84312fb7  headless.apkovl.tar.gz

make.sh

@@ -3,8 +3,14 @@
 # SPDX-FileCopyrightText: Copyright 2022-2023, macmpi
 # SPDX-License-Identifier: MIT
 
-# script meant to be run on Alpine (busybox) or on Ubuntu
+# Script meant to be run on Alpine (busybox) or on Ubuntu.
-# verify busybox build options if eventually using other platforms
+# Check busybox version & options if eventually using other platforms.
+
+# Ubuntu LTS busybox 1.30.1 tar does NOT support setting owner/group/mtime
+# probably available after busybox 1.31.1, following 2019-08-01 change:
+# https://git.busybox.net/busybox/commit/?id=e6a87e74837ba5f2f2207a75cd825acf8cf28afb
+# This limitation requires copying files and setting owner/group/mtime before archiving.
+
 command -v doas > /dev/null || alias doas="/usr/bin/sudo"
 
 build_path="$(mktemp -d)"