diff -ur a/go-current/src/make.bash b/go-current/src/make.bash
--- a/go-current/src/make.bash	2021-02-16 21:12:04.000000000 +0300
+++ b/go-current/src/make.bash	2021-02-17 00:42:09.963840381 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 # Copyright 2009 The Go Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
@@ -106,7 +106,7 @@
 # so loop through the possible selinux mount points.
 for se_mount in /selinux /sys/fs/selinux
 do
-	if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
+	if [ -d $se_mount ] && [ -f $se_mount/booleans/allow_execstack ] && [ -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
 		if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
 			echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
 			echo "Go. You can enable the features that Go needs via the following "
@@ -154,14 +154,14 @@
 
 export GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
 export GOROOT="$(cd .. && pwd)"
-IFS=$'\n'; for go_exe in $(type -ap go); do
+for go_exe in $(command -v go); do
 	if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
 		goroot=$(GOROOT='' GOOS='' GOARCH='' "$go_exe" env GOROOT)
 		if [ "$goroot" != "$GOROOT" ]; then
 			GOROOT_BOOTSTRAP=$goroot
 		fi
 	fi
-done; unset IFS
+done
 if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
 	echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
 	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
diff -ur a/go1.4-bootstrap/src/make.bash b/go1.4-bootstrap/src/make.bash
--- a/go1.4-bootstrap/src/make.bash	2017-11-22 04:33:58.000000000 +0300
+++ b/go1.4-bootstrap/src/make.bash	2021-02-17 00:40:52.245631282 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 # Copyright 2009 The Go Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
@@ -82,7 +82,7 @@
 # so loop through the possible selinux mount points.
 for se_mount in /selinux /sys/fs/selinux
 do
-	if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
+	if [ -d $se_mount ] && [ -f $se_mount/booleans/allow_execstack ] [ -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
 		if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
 			echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
 			echo "Go. You can enable the features that Go needs via the following "
@@ -102,7 +102,7 @@
 # Test for debian/kFreeBSD.
 # cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
 # disable cgo manually.
-if [ "$(uname -s)" == "GNU/kFreeBSD" ]; then
+if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
         export CGO_ENABLED=0
 fi
 
@@ -122,12 +122,12 @@
 386) mflag=-m32;;
 amd64) mflag=-m64;;
 esac
-if [ "$(uname)" == "Darwin" ]; then
+if [ "$(uname)" = "Darwin" ]; then
 	# golang.org/issue/5261
 	mflag="$mflag -mmacosx-version-min=10.6"
 fi
 # if gcc does not exist and $CC is not set, try clang if available.
-if [ -z "$CC" -a -z "$(type -t gcc)" -a -n "$(type -t clang)" ]; then
+if [ -z "$CC" ] && ! command -v gcc >/dev/null && command -v clang; then
 	export CC=clang CXX=clang++
 fi
 ${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c
@@ -162,7 +162,7 @@
 "$GOTOOLDIR"/go_bootstrap clean -i std
 echo
 
-if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then
+if [ "$GOHOSTARCH" != "$GOARCH" ] || [ "$GOHOSTOS" != "$GOOS" ]; then
 	echo "# Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH."
 	# CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however,
 	# use the host compiler, CC, from `cmd/dist/dist env` instead.