diff --git a/Makefile b/Makefile
index bb60bc9b..e4fbb0d9 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,7 @@
 # https://libreboot.org/docs/build/
 #
 # Copyright (C) 2020, 2021, 2023 Leah Rowe <info@minifree.org>
+# Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -22,11 +23,13 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-.PHONY: all check download modules ich9m-descriptors payloads roms release \
-	clean crossgcc-clean install-dependencies-ubuntu \
-	install-dependencies-debian install-dependencies-arch \
-	install-dependencies-void install-dependencies-fedora38 \
-	install-dependencies-parabola
+.POSIX:
+
+#.PHONY: all check download modules ich9m-descriptors payloads roms release \
+#	clean crossgcc-clean install-dependencies-ubuntu \
+#	install-dependencies-debian install-dependencies-arch \
+#	install-dependencies-void install-dependencies-fedora38 \
+#	install-dependencies-parabola
 
 all: roms
 
diff --git a/gitclone b/gitclone
index 4f811b3f..70b4e7f7 100755
--- a/gitclone
+++ b/gitclone
@@ -1,6 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 # SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>
 # SPDX-License-Identifier: GPL-3.0-only
 
@@ -47,7 +48,9 @@ read_config()
 			bkup_url=${2}
 			;;
 		esac
-	done <<< $(eval "awk '${awkstr}' resources/git/revisions")
+	done << EOF
+	$(eval "awk '${awkstr}' resources/git/revisions")
+EOF
 }
 
 verify_config()
diff --git a/resources/scripts/build/boot/roms b/resources/scripts/build/boot/roms
index 07f92a83..f0398273 100755
--- a/resources/scripts/build/boot/roms
+++ b/resources/scripts/build/boot/roms
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #
 #  helper script: build coreboot images with various payloads
@@ -7,6 +7,7 @@
 #							<info@minifree.org>
 #	Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
 #	Copyright (C) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
@@ -30,7 +31,7 @@ set -u -e
 
 projectname="$(cat projectname)"
 opts=""
-boards=""
+boards=
 firstoption="${1}"
 
 main()
@@ -49,19 +50,19 @@ main()
 		exit 0
 	fi
 
-	while [[ $# > 0 ]]; do
+	while [ $# -gt 0 ]; do
 		case ${1} in
 			-d)
-			opts+=" -d ${2}"
+			opts="${opts} -d ${2}"
 			shift ;;
 			-p)
-			opts+=" -p ${2}"
+			opts="${opts} -p ${2}"
 			shift ;;
 			-k)
-			opts+=" -k ${2}"
+			opts="${opts} -k ${2}"
 			shift ;;
 			*)
-			boards+=" ${1} " ;;
+			boards="${boards} ${1} " ;;
 		esac
 		shift
 	done
diff --git a/resources/scripts/build/boot/roms_helper b/resources/scripts/build/boot/roms_helper
index c5cb5df4..02d8f61f 100755
--- a/resources/scripts/build/boot/roms_helper
+++ b/resources/scripts/build/boot/roms_helper
@@ -1,9 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: create ROM images for a given mainboard
 #
 #	Copyright (C) 2020,2021,2023 Leah Rowe <info@minifree.org>
-#	Copyright (C) 2021 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+#	Copyright (C) 2021,2022 Ferass El Hafidi
+#				<vitali64pmemail@protonmail.com>
 #	Copyright (C) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
 #	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
 #
@@ -63,16 +64,16 @@ CROSS_COMPILE=""
 
 main()
 {
-	while [[ $# > 0 ]]; do
+	while [ $# -gt 0 ]; do
 		case ${1} in
 			-d)
-			displaymodes+="${2}" 
+			displaymodes="${displaymodes}${2}" 
 			shift ;;
 			-p)
-			payloads+="${2}"
+			payloads="${payloads}${2}"
 			shift ;;
 			-k)
-			keyboard_layouts+="${2}"
+			keyboard_layouts="${keyboard_layouts}${2}"
 			shift ;;
 			*)
 			board=${1} ;;
@@ -107,7 +108,7 @@ load_config()
 		exit 1
 	fi
 
-	source "${boardcfgdir}/board.cfg"
+	. "${boardcfgdir}/board.cfg"
 
 	if [ "${board}" != "${cbtree}" ]; then
 		cbdir="coreboot/${cbtree}"
@@ -554,11 +555,11 @@ mkRomsWithGrub()
 	keymaps=""
 	if [ -z ${keyboard_layouts} ]; then
 		for kmapfile in "${kmapdir}"/*; do
-			keymaps+=" ${kmapfile}"
+			keymaps="${keymaps} ${kmapfile}"
 		done
 	else
 		for keymapname in ${keyboard_layouts}; do
-			keymaps+=" ${kmapdir}/${keymapname}.gkb"
+			keymaps="${keymaps} ${kmapdir}/${keymapname}.gkb"
 		done
 	fi
 	for keymapfile in ${keymaps}; do
@@ -694,10 +695,11 @@ moverom()
 
 	if [ "${cuttype}" = "i945 laptop" ]; then
 		dd if=${_newrom} of=top64k.bin bs=1 \
-				skip=$[$(stat -c %s ${_newrom}) - 0x10000] \
+				skip=$(($(stat -c %s ${_newrom}) - 0x10000)) \
 				count=64k
-		dd if=top64k.bin of=${_newrom} bs=1 seek=$[$(stat -c %s \
-				${_newrom}) - 0x20000] count=64k conv=notrunc
+		dd if=top64k.bin of=${_newrom} bs=1 \
+				seek=$(($(stat -c %s ${_newrom}) - 0x20000)) \
+				count=64k conv=notrunc
 		rm -f top64k.bin
 		return 0
 	fi
diff --git a/resources/scripts/build/clean/cbutils b/resources/scripts/build/clean/cbutils
index 2aff915f..0c0df0d3 100755
--- a/resources/scripts/build/clean/cbutils
+++ b/resources/scripts/build/clean/cbutils
@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the dependencies that were built in coreboot
 #
 #	Copyright (C) 2014, 2015, 2016, 2020 Leah Rowe <info@minifree.org>
-#	 Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
+#	Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -38,7 +38,7 @@ for board in coreboot/*; do
     make -C "${board}/" distclean
 
 	# Clean its utilities as well
-	for util in {cbfs,ifd,nvram}tool cbmem; do
+	for util in cbfstool ifdtool nvramtool cbmem; do
 		make -C "${board}/util/${util}/" clean
 	done
 	make -C "${board}/payloads/libpayload/" distclean
diff --git a/resources/scripts/build/clean/crossgcc b/resources/scripts/build/clean/crossgcc
index 7dcbf4a4..6c09c878 100755
--- a/resources/scripts/build/clean/crossgcc
+++ b/resources/scripts/build/clean/crossgcc
@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the crossgcc builds
 #
 #	Copyright (C) 2014-2016, 2020, 2023 Leah Rowe <info@minifree.org>
-#	 Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
+#	Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
diff --git a/resources/scripts/build/clean/flashrom b/resources/scripts/build/clean/flashrom
index 516a8d87..744052fc 100755
--- a/resources/scripts/build/clean/flashrom
+++ b/resources/scripts/build/clean/flashrom
@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the dependencies that were built in flashrom
 #
 #	Copyright (C) 2014, 2015 Leah Rowe <info@minifree.org>
-#	 Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
+#	Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
diff --git a/resources/scripts/build/clean/grub b/resources/scripts/build/clean/grub
index 4330dfca..dea2c2dd 100755
--- a/resources/scripts/build/clean/grub
+++ b/resources/scripts/build/clean/grub
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the dependencies that were built in GRUB
 #
diff --git a/resources/scripts/build/clean/ich9utils b/resources/scripts/build/clean/ich9utils
index 35b9dc4b..38ad439f 100755
--- a/resources/scripts/build/clean/ich9utils
+++ b/resources/scripts/build/clean/ich9utils
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the previous build of ich9utils
 #
diff --git a/resources/scripts/build/clean/memtest86plus b/resources/scripts/build/clean/memtest86plus
index e4d7b200..807b20a7 100755
--- a/resources/scripts/build/clean/memtest86plus
+++ b/resources/scripts/build/clean/memtest86plus
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the dependencies that were built in memtest86+
 #
diff --git a/resources/scripts/build/clean/payloads b/resources/scripts/build/clean/payloads
index f4dab88a..4d77b9ea 100755
--- a/resources/scripts/build/clean/payloads
+++ b/resources/scripts/build/clean/payloads
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: nothing to see here, forks!
 #
diff --git a/resources/scripts/build/clean/rom_images b/resources/scripts/build/clean/rom_images
index cac69226..cd41d499 100755
--- a/resources/scripts/build/clean/rom_images
+++ b/resources/scripts/build/clean/rom_images
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: delete the ROM images
 #
diff --git a/resources/scripts/build/clean/seabios b/resources/scripts/build/clean/seabios
index 6362a311..0757db9d 100755
--- a/resources/scripts/build/clean/seabios
+++ b/resources/scripts/build/clean/seabios
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the dependencies that were built in seabios
 #
diff --git a/resources/scripts/build/clean/u-boot b/resources/scripts/build/clean/u-boot
index 5d9a324a..6a59a5c1 100755
--- a/resources/scripts/build/clean/u-boot
+++ b/resources/scripts/build/clean/u-boot
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: clean the u-boot builds
 #
diff --git a/resources/scripts/build/dependencies/arch b/resources/scripts/build/dependencies/arch
index 91210191..c20a1faf 100644
--- a/resources/scripts/build/dependencies/arch
+++ b/resources/scripts/build/dependencies/arch
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # arch script: installs build dependencies for Arch Linux
 #
diff --git a/resources/scripts/build/dependencies/debian b/resources/scripts/build/dependencies/debian
index 789ee749..fb0ae248 100755
--- a/resources/scripts/build/dependencies/debian
+++ b/resources/scripts/build/dependencies/debian
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # ubuntu2004 script: installs build dependencies for Ubuntu 20.04
 #
diff --git a/resources/scripts/build/dependencies/fedora38 b/resources/scripts/build/dependencies/fedora38
index 396300e8..2389b806 100755
--- a/resources/scripts/build/dependencies/fedora38
+++ b/resources/scripts/build/dependencies/fedora38
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # Fedora script: installs build dependencies for Fedora
 #
diff --git a/resources/scripts/build/dependencies/parabola b/resources/scripts/build/dependencies/parabola
index c841c7c2..da284bed 100755
--- a/resources/scripts/build/dependencies/parabola
+++ b/resources/scripts/build/dependencies/parabola
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # parabola script: installs build dependencies for Parabola GNU/Linux-libre
 # based on the arch script
diff --git a/resources/scripts/build/dependencies/ubuntu2004 b/resources/scripts/build/dependencies/ubuntu2004
index dda88fde..14a1d8c2 100755
--- a/resources/scripts/build/dependencies/ubuntu2004
+++ b/resources/scripts/build/dependencies/ubuntu2004
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # ubuntu2004 script: installs build dependencies for Ubuntu 20.04
 #
diff --git a/resources/scripts/build/dependencies/void b/resources/scripts/build/dependencies/void
index bbd00a15..e46cd5ee 100755
--- a/resources/scripts/build/dependencies/void
+++ b/resources/scripts/build/dependencies/void
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # void script: installs build dependencies for Void Linux
 #
diff --git a/resources/scripts/build/descriptors/ich9m b/resources/scripts/build/descriptors/ich9m
index 35cc9570..b9a077d9 100755
--- a/resources/scripts/build/descriptors/ich9m
+++ b/resources/scripts/build/descriptors/ich9m
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #	 Copyright (C) 2020, 2023 Leah Rowe <info@minifree.org>
 #
diff --git a/resources/scripts/build/module/cbutils b/resources/scripts/build/module/cbutils
index 526467bd..b362ee7a 100755
--- a/resources/scripts/build/module/cbutils
+++ b/resources/scripts/build/module/cbutils
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: build various coreboot utilities
 #
@@ -44,7 +44,7 @@ build_for_mainboard() {
 	[ ! -f "resources/coreboot/${board}/board.cfg" ] && \
 		continue
 	cbtree="undefined"
-	source "resources/coreboot/${board}/board.cfg" # source
+	. "resources/coreboot/${board}/board.cfg" # source
 	if [ "${cbtree}" = "undefined" ]; then
 		printf "build/cbutils: improper cbtree definition for '%s'" \
 				"${board}"
@@ -58,7 +58,7 @@ buildutils() {
 	if [ ! -d "coreboot/${cbtree}/" ]; then
 		./download coreboot $cbtree || return 1
 	fi
-	for util in {cbfs,ifd}tool; do
+	for util in cbfstool ifdtool; do
 		make -j$(nproc) -BC "coreboot/${cbtree}/util/${util}/" \
 				|| return 1
 	done
diff --git a/resources/scripts/build/module/flashrom b/resources/scripts/build/module/flashrom
index c1641d94..37f57ce0 100755
--- a/resources/scripts/build/module/flashrom
+++ b/resources/scripts/build/module/flashrom
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: builds flashrom source code
 #
diff --git a/resources/scripts/build/module/grub b/resources/scripts/build/module/grub
index 4d2009ed..5cf58a67 100755
--- a/resources/scripts/build/module/grub
+++ b/resources/scripts/build/module/grub
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: builds GRUB2 source code
 #
diff --git a/resources/scripts/build/module/ich9utils b/resources/scripts/build/module/ich9utils
index 5a9fbe4b..5473a513 100755
--- a/resources/scripts/build/module/ich9utils
+++ b/resources/scripts/build/module/ich9utils
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: build ich9utils
 #
diff --git a/resources/scripts/build/module/memtest86plus b/resources/scripts/build/module/memtest86plus
index f57b7c57..7fc46be9 100755
--- a/resources/scripts/build/module/memtest86plus
+++ b/resources/scripts/build/module/memtest86plus
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: builds memtest86+ source code
 #
diff --git a/resources/scripts/build/payload/grub b/resources/scripts/build/payload/grub
index 7569fd86..23765f47 100755
--- a/resources/scripts/build/payload/grub
+++ b/resources/scripts/build/payload/grub
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #   generate GRUB ELF files (coreboot payload) and configuration files
 #
@@ -24,7 +24,7 @@ set -u -e
 grubcfgsdir="resources/grub"
 keymap=""
 
-source "${grubcfgsdir}/modules.list"
+. "${grubcfgsdir}/modules.list"
 
 main()
 {
diff --git a/resources/scripts/build/payload/seabios b/resources/scripts/build/payload/seabios
index ed31e3bb..f822a019 100755
--- a/resources/scripts/build/payload/seabios
+++ b/resources/scripts/build/payload/seabios
@@ -1,8 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: builds SeaBIOS source code
 #
 #	Copyright (C) 2020, 2021, 2023 Leah Rowe <info@minifree.org>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -36,7 +37,9 @@ main()
 	done
 
 	# clean it again. gotta keep it clean!
-	[[ -f Makefile ]] && make -C seabios distclean
+	if [ -f seabios/Makefile ]; then
+		make distclean -BC seabios || exit 1
+	fi
 
 	printf "Done! SeaBIOS files are in %s/\n\n" ${payloaddir}
 }
diff --git a/resources/scripts/build/payload/u-boot b/resources/scripts/build/payload/u-boot
index bc1cf997..bff41400 100755
--- a/resources/scripts/build/payload/u-boot
+++ b/resources/scripts/build/payload/u-boot
@@ -3,6 +3,7 @@
 #  helper script: builds U-Boot source code
 #
 #	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #	Copyright (C) 2023 Leah Rowe <leah@libreboot.org>
 #
 #    This program is free software: you can redistribute it and/or modify
@@ -96,7 +97,7 @@ handle_dependencies()
 	fi
 
 	# Override the above defaults using board.cfg
-	source "${board_dir}/board.cfg" # source
+	. "${board_dir}/board.cfg" # source
 
 	if [ "${ubtree}" = "undefined" ]; then
 		printf "build/u-boot %s: ubtree undefined\n" \
@@ -161,7 +162,12 @@ build_uboot_elf()
 	make -C "${ubdir}" olddefconfig
 	make -C "${ubdir}" -j"$(nproc)" all
 
-	for f in "${ubdir}"/u-boot{,.bin,.dtb,.img,.itb,.elf}; do
+	for f in "${ubdir}"/u-boot "${ubdir}"/u-boot.bin \
+			"${ubdir}"/u-boot.dtb \
+			"${ubdir}"/u-boot.img \
+			"${ubdir}"/u-boot.itb \
+			"${ubdir}"/u-boot.elf
+	do
 		if [ -f "$f" ]; then
 			mv "$f" "${dest_dir}/"
 		fi
diff --git a/resources/scripts/build/release/roms b/resources/scripts/build/release/roms
index 4a66ffa3..33200cc4 100755
--- a/resources/scripts/build/release/roms
+++ b/resources/scripts/build/release/roms
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: generate release archive (ROM images)
 #
diff --git a/resources/scripts/build/release/src b/resources/scripts/build/release/src
index 4c5e3bb0..09a9810e 100755
--- a/resources/scripts/build/release/src
+++ b/resources/scripts/build/release/src
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: generate release archive (source code)
 #
diff --git a/resources/scripts/misc/versioncheck b/resources/scripts/misc/versioncheck
index e9eea929..3118e297 100755
--- a/resources/scripts/misc/versioncheck
+++ b/resources/scripts/misc/versioncheck
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #	Copyright (C) 2021 Leah Rowe <info@minifree.org>
 #
diff --git a/resources/scripts/modify/coreboot/configs b/resources/scripts/modify/coreboot/configs
index 89d253e3..665ee091 100755
--- a/resources/scripts/modify/coreboot/configs
+++ b/resources/scripts/modify/coreboot/configs
@@ -1,8 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: modify coreboot configs (run make menuconfig)
 #
 #	Copyright (C) 2021, 2023 Leah Rowe <info@minifree.org>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
@@ -49,7 +50,7 @@ modifyconf() {
 	fi
 
 	cbtree=""
-	source "resources/coreboot/${board}/board.cfg" # source
+	. "resources/coreboot/${board}/board.cfg" # source
 
 	if [ -z ${cbtree} ]; then
 		return 0
diff --git a/resources/scripts/modify/seabios/configs b/resources/scripts/modify/seabios/configs
index 30423851..614a4371 100755
--- a/resources/scripts/modify/seabios/configs
+++ b/resources/scripts/modify/seabios/configs
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: modify coreboot configs (run make menuconfig)
 #
diff --git a/resources/scripts/modify/u-boot/configs b/resources/scripts/modify/u-boot/configs
index b44aae47..9572a5b8 100755
--- a/resources/scripts/modify/u-boot/configs
+++ b/resources/scripts/modify/u-boot/configs
@@ -1,8 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: modify U-Boot configs (run make menuconfig)
 #
 #	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #	Copyright (C) 2023 Leah Rowe <info@minifree.org>
 #
 #	This program is free software: you can redistribute it and/or modify
@@ -50,7 +51,7 @@ modifyconf()
 	fi
 
 	ubtree="undefined"
-	source "resources/u-boot/${board}/board.cfg" # source
+	. "resources/u-boot/${board}/board.cfg" # source
 
 	if [ "${ubtree}" = "undefined" ]; then
 		return 0
diff --git a/resources/scripts/update/blobs/download b/resources/scripts/update/blobs/download
index 57bdfe62..7c775ea5 100755
--- a/resources/scripts/update/blobs/download
+++ b/resources/scripts/update/blobs/download
@@ -1,6 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 # SPDX-FileCopyrightText: 2023 Leah Rowe <info@minifree.org>
 # SPDX-License-Identifier: GPL-3.0-only
 
@@ -63,23 +64,23 @@ detect_firmware()
 	. "${boarddir}/board.cfg"
 
 	if [ "${CONFIG_HAVE_MRC}" = "y" ]; then
-		needs+=" MRC"
+		needs="${needs} MRC"
 	fi
 	if [ "${CONFIG_HAVE_IFD_BIN}" = "y" ]; then
-		needs+=" IFD"
+		needs="${needs} IFD"
 	fi
 	if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
-		needs+=" ME"
+		needs="${needs} ME"
 	fi
 	if [ "${CONFIG_HAVE_GBE_BIN}" = "y" ]; then
-		needs+=" GBE"
+		needs="${needs} GBE"
 	fi
 	if [ "${CONFIG_KBC1126_FIRMWARE}" = "y" ]; then
-		needs+=" EC"
+		needs="${needs} EC"
 	fi
 	if [ "${CONFIG_BOARD_DELL_E6400}" = "y" ] \
 			&& [ "${CONFIG_VGA_BIOS_FILE}" != "" ]; then
-		needs+=" E6400VGA"
+		needs="${needs} E6400VGA"
 	fi
 	if [ -z ${needs+x} ]; then
 		printf 'No binary blobs needed for this board\n'
@@ -142,7 +143,9 @@ scan_sources_config()
 			e6400_vga_romname=${2}
 			;;
 		esac
-	done <<< $(eval "awk '${awkstr}' resources/blobs/sources")
+	done << EOF
+	$(eval "awk '${awkstr}' resources/blobs/sources")
+EOF
 }
 
 build_dependencies()
@@ -178,16 +181,16 @@ download_blobs()
 	for need in ${needs}; do
 		case ${need} in
 		*ME*)
-			download_blob_intel_me || _failed+=" me"
+			download_blob_intel_me || _failed="${_failed} me"
 			;;
 		*EC*)
-			download_ec || _failed+=" ec"
+			download_ec || _failed="${_failed} ec"
 			;;
 		*E6400VGA*)
-			download_e6400vga || _failed+=" e6400vga"
+			download_e6400vga || _failed="${_failed} e6400vga"
 			;;
 		*MRC*)
-			./download mrc || _failed+=" mrc"
+			./download mrc || _failed="${_failed} mrc"
 			;;
 		esac
 	done
diff --git a/resources/scripts/update/blobs/extract b/resources/scripts/update/blobs/extract
index 8e9c74ed..b32ec0ea 100755
--- a/resources/scripts/update/blobs/extract
+++ b/resources/scripts/update/blobs/extract
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 # script to automate extracting blobs from an existing vendor bios
 
 # SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
diff --git a/resources/scripts/update/blobs/inject b/resources/scripts/update/blobs/inject
index 51f67255..ca8aae4c 100755
--- a/resources/scripts/update/blobs/inject
+++ b/resources/scripts/update/blobs/inject
@@ -1,6 +1,7 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 # SPDX-FileCopyrightText: 2023 Leah Rowe <info@minifree.org>
 # SPDX-License-Identifier: GPL-3.0-only
 
@@ -111,10 +112,10 @@ detect_board()
 	filename=$(basename ${path})
 	case ${filename} in
 		grub_*)
-		board=$(cut -d '_' -f2-3 <<<${filename})
+		board=$(echo "${filename}" | cut -d '_' -f2-3)
 		;;
 		seabios_withgrub_*)
-		board=$(cut -d '_' -f3-4 <<<${filename})
+		board=$(echo "${filename}" | cut -d '_' -f3-4)
 		;;
 		*.tar.xz)
 		_stripped_prefix=${filename#*_}
diff --git a/resources/scripts/update/coreboot/configs b/resources/scripts/update/coreboot/configs
index 6637a340..cd5299b3 100755
--- a/resources/scripts/update/coreboot/configs
+++ b/resources/scripts/update/coreboot/configs
@@ -1,9 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #
 #  helper script: update coreboot configs (run make oldconfig)
 #
 #	Copyright (C) 2021 Leah Rowe <info@minifree.org>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
@@ -54,7 +55,7 @@ updateconf()
 
 	if [ -f "${boarddir}/board.cfg" ]; then
 		cbtree="undefined"
-		source "${boarddir}/board.cfg" # source
+		. "${boarddir}/board.cfg" # source
 		if [ "${cbtree}" = "undefined" ]; then
 			return 0
 		fi
diff --git a/resources/scripts/update/module/coreboot b/resources/scripts/update/module/coreboot
index 75b61a6f..2e78636b 100755
--- a/resources/scripts/update/module/coreboot
+++ b/resources/scripts/update/module/coreboot
@@ -1,9 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: download coreboot
 #
 #	Copyright (C) 2014-2016,2020,2021,2023 Leah Rowe <info@minifree.org>
 #	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
@@ -86,7 +87,7 @@ fetch_coreboot_config()
 		check_config_for_board "${_board}" || return 1
 
 		# This is to override $cbrevision and $cbtree
-		source "${cbcfgsdir}/${_board}/board.cfg" || exit 1
+		. "${cbcfgsdir}/${_board}/board.cfg" || exit 1
 
 		if [ "${_board}" != "${cbtree}" ]; then
 			_board="${cbtree}"
diff --git a/resources/scripts/update/module/flashrom b/resources/scripts/update/module/flashrom
index 6aa3cab4..def33ffb 100755
--- a/resources/scripts/update/module/flashrom
+++ b/resources/scripts/update/module/flashrom
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: downloads flashrom and patches it
 #
diff --git a/resources/scripts/update/module/grub b/resources/scripts/update/module/grub
index 0620a775..ff1ce55c 100755
--- a/resources/scripts/update/module/grub
+++ b/resources/scripts/update/module/grub
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: Downloads GRUB and patches it.
 #
diff --git a/resources/scripts/update/module/me_cleaner b/resources/scripts/update/module/me_cleaner
index 7dd52be7..93173257 100755
--- a/resources/scripts/update/module/me_cleaner
+++ b/resources/scripts/update/module/me_cleaner
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 #
 #   Copyright (C) 2020 Leah Rowe <info@minifree.org>
 #
diff --git a/resources/scripts/update/module/memtest86plus b/resources/scripts/update/module/memtest86plus
index bceadbd9..e4106f38 100755
--- a/resources/scripts/update/module/memtest86plus
+++ b/resources/scripts/update/module/memtest86plus
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: Downloads MemTest86+ and patches it
 #
diff --git a/resources/scripts/update/module/seabios b/resources/scripts/update/module/seabios
index fd72de65..666c32ae 100755
--- a/resources/scripts/update/module/seabios
+++ b/resources/scripts/update/module/seabios
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 #
 #   Copyright (C) 2015, 2016, 2021 Leah Rowe <info@minifree.org>
 #
diff --git a/resources/scripts/update/module/u-boot b/resources/scripts/update/module/u-boot
index 1af513a4..161608c9 100755
--- a/resources/scripts/update/module/u-boot
+++ b/resources/scripts/update/module/u-boot
@@ -1,9 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #  helper script: download u-boot
 #
 #	Copyright (C) 2021 Denis 'GNUtoo' Carikli  <GNUtoo@cyberdimension.org>
 #	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
 #
 #	This program is free software: you can redistribute it and/or modify
 #	it under the terms of the GNU General Public License as published by
@@ -22,7 +23,7 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
-[[ -f build_error ]] && rm -f build_error
+[ -f build_error ] && rm -f build_error
 
 list_supported_boards() {
 	for board in resources/u-boot/*; do
@@ -55,7 +56,7 @@ downloadfor() {
 		fi
 
 		# This is to override $ubrevision and $ubtree
-		source "resources/u-boot/${board}/board.cfg" || touch build_error
+		. "resources/u-boot/${board}/board.cfg" || touch build_error
 		if [ -f build_error ]; then
 			printf "ERROR: %s: problem sourcing %s/board.cfg\n" \
 				"download/u-boot" "${board}"
@@ -239,10 +240,10 @@ if [ $# -eq 0 ] ; then
 		download_uboot_board "${board}"
 	done
 	exit 0
-elif [ $# -eq 1 -a "$1" == "--help" ] ; then
+elif [ $# -eq 1 ] && [ "$1" = "--help" ] ; then
 	usage
 	exit 0
-elif [ $# -eq 1 -a "$1" == "--list-boards" ] ; then
+elif [ $# -eq 1 ] && [ "$1" = "--list-boards" ] ; then
 	list_supported_boards
 	exit 0
 elif [ $# -eq 1 ] ; then
diff --git a/resources/scripts/update/u-boot/configs b/resources/scripts/update/u-boot/configs
index 9b67eede..b01ef0db 100755
--- a/resources/scripts/update/u-boot/configs
+++ b/resources/scripts/update/u-boot/configs
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #
 #  helper script: update U-Boot configs (run make oldconfig)
@@ -33,7 +33,7 @@ updateconf() {
 	board="$1"
 	if [ -f "resources/u-boot/${board}/board.cfg" ]; then
         ubtree="undefined"
-        source "resources/u-boot/${board}/board.cfg" # source
+        . "resources/u-boot/${board}/board.cfg" # source
         if [ "${ubtree}" = "undefined" ]; then
             return 0
         fi