diff --git a/.gitignore b/.gitignore
index a27db0bd1f..04eb4bf8c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 Session.vim
 .netrwhist
 *~
+/build-tools/
 /debs/
 ### Vagrant ###
 scripts/*.log
diff --git a/scripts/build/setup/termux_setup_cmake.sh b/scripts/build/setup/termux_setup_cmake.sh
index c8c4078e9a..0fa87d0d73 100644
--- a/scripts/build/setup/termux_setup_cmake.sh
+++ b/scripts/build/setup/termux_setup_cmake.sh
@@ -4,7 +4,13 @@ termux_setup_cmake() {
 	local TERMUX_CMAKE_VERSION=$TERMUX_CMAKE_MAJORVESION.$TERMUX_CMAKE_MINORVERSION
 	local TERMUX_CMAKE_TARNAME=cmake-${TERMUX_CMAKE_VERSION}-Linux-x86_64.tar.gz
 	local TERMUX_CMAKE_TARFILE=$TERMUX_PKG_TMPDIR/$TERMUX_CMAKE_TARNAME
-	local TERMUX_CMAKE_FOLDER=$TERMUX_COMMON_CACHEDIR/cmake-$TERMUX_CMAKE_VERSION
+	local TERMUX_CMAKE_FOLDER
+
+	if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+		TERMUX_CMAKE_FOLDER=$TERMUX_SCRIPTDIR/build-tools/cmake-$TERMUX_CMAKE_VERSION
+	else
+		TERMUX_CMAKE_FOLDER=$TERMUX_COMMON_CACHEDIR/cmake-$TERMUX_CMAKE_VERSION
+	fi
 
 	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
 		if [ ! -d "$TERMUX_CMAKE_FOLDER" ]; then
diff --git a/scripts/build/setup/termux_setup_ghc.sh b/scripts/build/setup/termux_setup_ghc.sh
index 59bdf8f189..04d7153aed 100644
--- a/scripts/build/setup/termux_setup_ghc.sh
+++ b/scripts/build/setup/termux_setup_ghc.sh
@@ -3,8 +3,14 @@ termux_setup_ghc() {
 	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
 		local TERMUX_GHC_VERSION=8.10.1
 		local TERMUX_GHC_TEMP_FOLDER="${TERMUX_COMMON_CACHEDIR}/ghc-${TERMUX_GHC_VERSION}"
-		local TERMUX_GHC_RUNTIME_FOLDER="${TERMUX_COMMON_CACHEDIR}/ghc-${TERMUX_GHC_VERSION}-runtime"
 		local TERMUX_GHC_TAR="${TERMUX_GHC_TEMP_FOLDER}.tar.xz"
+		local TERMUX_GHC_RUNTIME_FOLDER
+
+		if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+			TERMUX_GHC_RUNTIME_FOLDER="${TERMUX_SCRIPTDIR}/build-tools/ghc-${TERMUX_GHC_VERSION}-runtime"
+		else
+			TERMUX_GHC_RUNTIME_FOLDER="${TERMUX_COMMON_CACHEDIR}/ghc-${TERMUX_GHC_VERSION}-runtime"
+		fi
 
 		export PATH="$TERMUX_GHC_RUNTIME_FOLDER/bin:$PATH"
 
diff --git a/scripts/build/setup/termux_setup_golang.sh b/scripts/build/setup/termux_setup_golang.sh
index 5527eb0730..3cb8825454 100644
--- a/scripts/build/setup/termux_setup_golang.sh
+++ b/scripts/build/setup/termux_setup_golang.sh
@@ -4,9 +4,15 @@ termux_setup_golang() {
 		local TERMUX_GO_VERSION=go1.15.3
 		local TERMUX_GO_PLATFORM=linux-amd64
 
-		local TERMUX_BUILDGO_FOLDER=$TERMUX_COMMON_CACHEDIR/${TERMUX_GO_VERSION}
+		local TERMUX_BUILDGO_FOLDER
+		if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+			TERMUX_BUILDGO_FOLDER=${TERMUX_SCRIPTDIR}/build-tools/${TERMUX_GO_VERSION}
+		else
+			TERMUX_BUILDGO_FOLDER=${TERMUX_COMMON_CACHEDIR}/${TERMUX_GO_VERSION}
+		fi
+
 		export GOROOT=$TERMUX_BUILDGO_FOLDER
-		export PATH=$GOROOT/bin:$PATH
+		export PATH=${GOROOT}/bin:${PATH}
 
 		if [ -d "$TERMUX_BUILDGO_FOLDER" ]; then return; fi
 
diff --git a/scripts/build/setup/termux_setup_meson.sh b/scripts/build/setup/termux_setup_meson.sh
index 074aaed9c7..05ea60aa73 100644
--- a/scripts/build/setup/termux_setup_meson.sh
+++ b/scripts/build/setup/termux_setup_meson.sh
@@ -1,7 +1,14 @@
 termux_setup_meson() {
 	termux_setup_ninja
 	local MESON_VERSION=0.55.0
-	local MESON_FOLDER=$TERMUX_COMMON_CACHEDIR/meson-$MESON_VERSION-v1
+	local MESON_FOLDER
+
+	if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+		MESON_FOLDER=${TERMUX_SCRIPTDIR}/build-tools/meson-${MESON_VERSION}
+	else
+		MESON_FOLDER=${TERMUX_COMMON_CACHEDIR}/meson-${MESON_VERSION}
+	fi
+
 	if [ ! -d "$MESON_FOLDER" ]; then
 		local MESON_TAR_NAME=meson-$MESON_VERSION.tar.gz
 		local MESON_TAR_FILE=$TERMUX_PKG_TMPDIR/$MESON_TAR_NAME
diff --git a/scripts/build/setup/termux_setup_ninja.sh b/scripts/build/setup/termux_setup_ninja.sh
index 1ff3d2877f..0111c8aec1 100644
--- a/scripts/build/setup/termux_setup_ninja.sh
+++ b/scripts/build/setup/termux_setup_ninja.sh
@@ -1,6 +1,12 @@
 termux_setup_ninja() {
 	local NINJA_VERSION=1.10.0
-	local NINJA_FOLDER=$TERMUX_COMMON_CACHEDIR/ninja-$NINJA_VERSION
+	local NINJA_FOLDER
+
+	if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+		NINJA_FOLDER=${TERMUX_SCRIPTDIR}/build-tools/ninja-${NINJA_VERSION}
+	else
+		NINJA_FOLDER=${TERMUX_COMMON_CACHEDIR}/ninja-$NINJA_VERSION
+	fi
 
 	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
 		if [ ! -x "$NINJA_FOLDER/ninja" ]; then
diff --git a/scripts/build/setup/termux_setup_protobuf.sh b/scripts/build/setup/termux_setup_protobuf.sh
index c6f3b22483..40d4d8c994 100644
--- a/scripts/build/setup/termux_setup_protobuf.sh
+++ b/scripts/build/setup/termux_setup_protobuf.sh
@@ -1,7 +1,13 @@
 termux_setup_protobuf() {
 	local _PROTOBUF_VERSION=$(bash -c ". $TERMUX_SCRIPTDIR/packages/libprotobuf/build.sh; echo \${TERMUX_PKG_VERSION:2}")
 	local _PROTOBUF_ZIP=protoc-$_PROTOBUF_VERSION-linux-x86_64.zip
-	local _PROTOBUF_FOLDER=$TERMUX_COMMON_CACHEDIR/protobuf-$_PROTOBUF_VERSION
+	local _PROTOBUF_FOLDER
+
+	if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then
+		_PROTOBUF_FOLDER=${TERMUX_SCRIPTDIR}/build-tools/protobuf-${_PROTOBUF_VERSION}
+	else
+		_PROTOBUF_FOLDER=${TERMUX_COMMON_CACHEDIR}/protobuf-${_PROTOBUF_VERSION}
+	fi
 
 	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
 		if [ ! -d "$_PROTOBUF_FOLDER" ]; then
diff --git a/scripts/build/termux_download.sh b/scripts/build/termux_download.sh
index 8c0af63311..533814cccc 100755
--- a/scripts/build/termux_download.sh
+++ b/scripts/build/termux_download.sh
@@ -14,7 +14,7 @@ termux_download() {
 	fi
 
 	local TMPFILE
-	TMPFILE=$(mktemp "$TERMUX_PKG_TMPDIR/download.$TERMUX_PKG_NAME.XXXXXXXXX")
+	TMPFILE=$(mktemp "$TERMUX_PKG_TMPDIR/download.${TERMUX_PKG_NAME-unnamed}.XXXXXXXXX")
 	echo "Downloading ${URL}"
 	if curl --fail --retry 20 --retry-connrefused --retry-delay 30 --location --output "$TMPFILE" "$URL"; then
 		local ACTUAL_CHECKSUM
diff --git a/scripts/setup-offline-bundle.sh b/scripts/setup-offline-bundle.sh
new file mode 100755
index 0000000000..36aae45c20
--- /dev/null
+++ b/scripts/setup-offline-bundle.sh
@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+##
+## Download and install all build tools whether applicable now, so
+## they will be available later for offline use.
+##
+
+set -e -u
+
+if [ "$(uname -o)" = "Android" ] || [ "$(uname -m)" != "x86_64" ]; then
+	echo "This script supports only x86_64 GNU/Linux systems."
+	exit 1
+fi
+
+export TERMUX_SCRIPTDIR="$(dirname "$(readlink -f "$0")")/../"
+mkdir -p "$TERMUX_SCRIPTDIR"/build-tools
+
+export TERMUX_PACKAGES_OFFLINE=true
+export TERMUX_ARCH=aarch64
+export TERMUX_ON_DEVICE_BUILD=false
+export TERMUX_PKG_TMPDIR=$TERMUX_SCRIPTDIR/build-tools/_tmp
+export TERMUX_COMMON_CACHEDIR=$TERMUX_PKG_TMPDIR
+export CC=gcc CXX=g++ LD=ld AR=ar STRIP=strip PKG_CONFIG=pkg-config
+export CPPFLAGS="" CFLAGS="" CXXFLAGS="" LDFLAGS=""
+mkdir -p "$TERMUX_PKG_TMPDIR"
+
+. "$TERMUX_SCRIPTDIR"/scripts/build/termux_download.sh
+(. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_cmake.sh
+	termux_setup_cmake
+)
+# GHC fails. Skipping for now.
+#(. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_ghc.sh
+#	termux_setup_ghc
+#)
+(. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_golang.sh
+	termux_setup_golang
+)
+(
+	. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_ninja.sh
+	. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_meson.sh
+	termux_setup_meson
+)
+(. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_protobuf.sh
+	termux_setup_protobuf
+)
+# Offline rust is not supported yet.
+#(. "$TERMUX_SCRIPTDIR"/scripts/build/setup/termux_setup_rust.sh
+#	termux_setup_rust
+#)
+rm -rf "${TERMUX_PKG_TMPDIR}"