diff --git a/scripts/android/build_boost.sh b/scripts/android/build_boost.sh
index 2da334703..4bd9c3dc5 100755
--- a/scripts/android/build_boost.sh
+++ b/scripts/android/build_boost.sh
@@ -1,16 +1,16 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
-ORIGINAL_PATH=$PATH
+. ./config.sh
+BOOST_SRC_DIR=$WORKDIR/boost_1_74_0
+BOOST_FILENAME=boost_1_74_0.tar.bz2
+BOOST_VERSION=1.74.0
 
 for arch in "aarch" "aarch64" "i686" "x86_64"
 do
 
 PREFIX=$WORKDIR/prefix_${arch}
-PATH="${TOOLCHAIN_BASE_DIR}_${arch}/bin:${ORIGINAL_PATH}"
 
-./init_boost.sh $arch
-./finish_boost.sh $arch
+./init_boost.sh $arch $PREFIX $BOOST_SRC_DIR $BOOST_FILENAME $BOOST_VERSION
+./finish_boost.sh $arch $PREFIX $BOOST_SRC_DIR $BOOST_SRC_DIR
 
 done
diff --git a/scripts/android/build_iconv.sh b/scripts/android/build_iconv.sh
index 9c0350a01..82ee50c54 100755
--- a/scripts/android/build_iconv.sh
+++ b/scripts/android/build_iconv.sh
@@ -1,29 +1,27 @@
-# /bin/bash
+#!/bin/sh
 
-export WORKDIR=/opt/android
-export ICONV_FILENAME=libiconv-1.15.tar.gz
+. ./config.sh
+export ICONV_FILENAME=libiconv-1.16.tar.gz
 export ICONV_FILE_PATH=$WORKDIR/$ICONV_FILENAME
-export ICONV_SRC_DIR=$WORKDIR/libiconv-1.15
+export ICONV_SRC_DIR=$WORKDIR/libiconv-1.16
+ICONV_SHA256="e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04"
 
-wget http://ftp.gnu.org/pub/gnu/libiconv/$ICONV_FILENAME -O $ICONV_FILE_PATH
-
-ORIGINAL_PATH=$PATH
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
+curl http://ftp.gnu.org/pub/gnu/libiconv/$ICONV_FILENAME -o $ICONV_FILE_PATH
+echo $ICONV_SHA256 $ICONV_FILE_PATH | sha256sum -c - || exit 1
 
 for arch in aarch aarch64 i686 x86_64
 do
 
 PREFIX=${WORKDIR}/prefix_${arch}
-PATH="${TOOLCHAIN_BASE_DIR}_${arch}/bin:${ORIGINAL_PATH}"
 
 case $arch in
 	"aarch"	)
-		CLANG=arm-linux-androideabi-clang
-		CXXLANG=arm-linux-androideabi-clang++
-		HOST="arm-linux-android";;
+		CLANG=armv7a-linux-androideabi${API}-clang
+		CXXLANG=armv7a-linux-androideabi${API}-clang++
+		HOST="arm";;
 	*		)
-		CLANG=${arch}-linux-android-clang
-		CXXLANG=${arch}-linux-android-clang++
+		CLANG=${arch}-linux-android${API}-clang
+		CXXLANG=${arch}-linux-android${API}-clang++
 		HOST="${arch}-linux-android";;
 esac 
 
@@ -36,3 +34,4 @@ make
 make install
 
 done
+
diff --git a/scripts/android/build_monero.sh b/scripts/android/build_monero.sh
index c2db7c085..44e8fe1ab 100755
--- a/scripts/android/build_monero.sh
+++ b/scripts/android/build_monero.sh
@@ -1,10 +1,9 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
-ORIGINAL_PATH=$PATH
+. ./config.sh
 MONERO_BRANCH=v0.17.1.9-android
 MONERO_SRC_DIR=${WORKDIR}/monero
+CMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake"
 
 git clone https://github.com/cake-tech/monero.git ${MONERO_SRC_DIR} --branch ${MONERO_BRANCH}
 cd $MONERO_SRC_DIR
@@ -15,8 +14,6 @@ for arch in "aarch" "aarch64" "i686" "x86_64"
 do
 FLAGS=""
 PREFIX=${WORKDIR}/prefix_${arch}
-ANDROID_STANDALONE_TOOLCHAIN_PATH="${TOOLCHAIN_BASE_DIR}_${arch}"
-PATH="${ANDROID_STANDALONE_TOOLCHAIN_PATH}/bin:${ORIGINAL_PATH}"
 DEST_LIB_DIR=${PREFIX}/lib/monero
 DEST_INCLUDE_DIR=${PREFIX}/include
 export CMAKE_INCLUDE_PATH="${PREFIX}/include"
@@ -27,30 +24,30 @@ mkdir -p $DEST_INCLUDE_DIR
 
 case $arch in
 	"aarch"	)
-		CLANG=arm-linux-androideabi-clang
-		CXXLANG=arm-linux-androideabi-clang++
+		ANDROID_CLANG=armv7a-linux-androideabi${API}-clang
+		ANDROID_CLANGPP=armv7a-linux-androideabi${API}-clang++
 		BUILD_64=OFF
 		TAG="android-armv7"
 		ARCH="armv7-a"
 		ARCH_ABI="armeabi-v7a"
 		FLAGS="-D CMAKE_ANDROID_ARM_MODE=ON -D NO_AES=true";;
 	"aarch64"	)
-		CLANG=aarch64-linux-androideabi-clang
-		CXXLANG=aarch64-linux-androideabi-clang++
+		ANDROID_CLANG=aarch64-linux-androideabi${API}-clang
+		ANDROID_CLANGPP=aarch64-linux-androideabi${API}-clang++
 		BUILD_64=ON
 		TAG="android-armv8"
 		ARCH="armv8-a"
 		ARCH_ABI="arm64-v8a";;
 	"i686"		)
-		CLANG=i686-linux-androideabi-clang
-		CXXLANG=i686-linux-androideabi-clang++
+		ANDROID_CLANG=i686-linux-androideabi${API}-clang
+		ANDROID_CLANGPP=i686-linux-androideabi${API}-clang++
 		BUILD_64=OFF
 		TAG="android-x86"
 		ARCH="i686"
 		ARCH_ABI="x86";;
-	"x86_64"	)
-		CLANG=x86_64-linux-androideabi-clang
-		CXXLANG=x86_64-linux-androideabi-clang++
+	"x86_64"	)  
+		ANDROID_CLANG=x86_64-linux-androideabi${API}-clang
+		ANDROID_CLANGPP=x86_64-linux-androideabi${API}-clang++
 		BUILD_64=ON
 		TAG="android-x86_64"
 		ARCH="x86-64"
@@ -61,7 +58,25 @@ cd $MONERO_SRC_DIR
 rm -rf ./build/release
 mkdir -p ./build/release
 cd ./build/release
-CC=${CLANG} CXX=${CXXLANG} cmake -D USE_DEVICE_TREZOR=OFF -D BUILD_GUI_DEPS=1 -D BUILD_TESTS=OFF -D ARCH=${ARCH} -D STATIC=ON -D BUILD_64=${BUILD_64} -D CMAKE_BUILD_TYPE=release -D ANDROID=true -D INSTALL_VENDORED_LIBUNBOUND=ON -D BUILD_TAG=${TAG} -D CMAKE_SYSTEM_NAME="Android" -D CMAKE_ANDROID_STANDALONE_TOOLCHAIN="${ANDROID_STANDALONE_TOOLCHAIN_PATH}" -D CMAKE_ANDROID_ARCH_ABI=${ARCH_ABI} $FLAGS ../..
+    cmake \
+    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} \
+    -DCMAKE_PREFIX_PATH="${PREFIX}" \
+    -DCMAKE_FIND_ROOT_PATH="${PREFIX}" \
+    -DCMAKE_BUILD_TYPE=release \
+    -DARCH=$ARCH \
+    -DANDROID=true \
+    -DANDROID_NATIVE_API_LEVEL=$API \
+    -DANDROID_ABI=$ARCH_ABI \
+    -DANDROID_TOOLCHAIN=clang \
+    -DLRELEASE_PATH="${PREFIX}/bin" \
+    -DSTATIC=ON \
+    -DBUILD_64=$BUILD_64 \
+    -DINSTALL_VENDORED_LIBUNBOUND=ON \
+    -DUSE_DEVICE_TREZOR=OFF \
+    -DBUILD_GUI_DEPS=1 \
+    -DBUILD_TESTS=OFF \
+    ${FLAGS} ../..
+    
 make wallet_api -j4
 find . -path ./lib -prune -o -name '*.a' -exec cp '{}' lib \;
 
diff --git a/scripts/android/build_openssl.sh b/scripts/android/build_openssl.sh
index 3674612b0..3039a6169 100755
--- a/scripts/android/build_openssl.sh
+++ b/scripts/android/build_openssl.sh
@@ -1,44 +1,62 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-OPENSSL_FILENAME=openssl-1.0.2p.tar.gz
+. ./config.sh
+OPENSSL_FILENAME=openssl-1.1.1k.tar.gz
 OPENSSL_FILE_PATH=$WORKDIR/$OPENSSL_FILENAME
-OPENSSL_SRC_DIR=$WORKDIR/openssl-1.0.2p
+OPENSSL_SRC_DIR=$WORKDIR/openssl-1.1.1k
+OPENSSL_SHA256="892a0875b9872acd04a9fde79b1f943075d5ea162415de3047c327df33fbaee5"
 ZLIB_FILENAME=zlib-1.2.11.tar.gz
 ZLIB_FILE_PATH=$WORKDIR/$ZLIB_FILENAME
 ZLIB_SRC_DIR=$WORKDIR/zlib-1.2.11
-ORIGINAL_PATH=$PATH
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
+ZLIB_SHA256="c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1"
+
+curl https://zlib.net/$ZLIB_FILENAME -o $ZLIB_FILE_PATH
+echo $ZLIB_SHA256 $ZLIB_FILE_PATH | sha256sum -c - || exit 1
 
-wget https://zlib.net/$ZLIB_FILENAME -O $ZLIB_FILE_PATH
 tar -xzf $ZLIB_FILE_PATH -C $WORKDIR
 cd $ZLIB_SRC_DIR
 CC=clang CXX=clang++ ./configure --static
 make
 
-wget https://www.openssl.org/source/$OPENSSL_FILENAME -O $OPENSSL_FILE_PATH
+curl https://www.openssl.org/source/$OPENSSL_FILENAME -o $OPENSSL_FILE_PATH
+echo $OPENSSL_SHA256 $OPENSSL_FILE_PATH | sha256sum -c - || exit 1
 
 for arch in "aarch" "aarch64" "i686" "x86_64"
 do
-
 PREFIX=$WORKDIR/prefix_${arch}
-PATH="${TOOLCHAIN_BASE_DIR}_${arch}/bin:${ORIGINAL_PATH}"
 
 case $arch in
-	"aarch"	) TARGET="armv7";;
-	*		) TARGET="${arch}";;
-esac 
+	"aarch")   CLANG=armv7a-linux-androideabi${API}-clang
+		   CXXLANG=armv7a-linux-androideabi${API}-clang++
+		   X_ARCH="android-arm";;
+	"aarch64") CLANG=${arch}-linux-android${API}-clang
+		   CXXLANG=${arch}-linux-android${API}-clang++
+		   X_ARCH="android-arm64";;
+	"i686")    CLANG=${arch}-linux-android${API}-clang
+		   CXXLANG=${arch}-linux-android${API}-clang++
+		   X_ARCH="android-x86";;
+	"x86_64")  CLANG=${arch}-linux-android${API}-clang
+		   CXXLANG=${arch}-linux-android${API}-clang++
+		   X_ARCH="android-x86_64";;
+	*)	   CLANG=${arch}-linux-android${API}-clang
+		   CXXLANG=${arch}-linux-android${API}-clang++
+		   X_ARCH="android-${arch}";;
+esac 	
 
 cd $WORKDIR
 rm -rf $OPENSSL_SRC_DIR
 tar -xzf $OPENSSL_FILE_PATH -C $WORKDIR
 cd $OPENSSL_SRC_DIR
-sed -i -e "s/mandroid/target\ ${TARGET}\-linux\-android/" Configure
-CC=clang CXX=clang++ ./Configure android no-asm  no-shared --static --with-zlib-include=${WORKDIR}/zlib --with-zlib-lib=${ZLIB_SRC_DIR}  --prefix=${PREFIX} --openssldir=${PREFIX}
-make
+./Configure CC=${CLANG} CXX=${CXXLANG} ${X_ARCH} \
+	no-asm no-shared --static \
+	--with-zlib-include=${PREFIX}/include \
+	--with-zlib-lib=${PREFIX}/lib \
+	--prefix=${PREFIX} \
+	--openssldir=${PREFIX} \
+	-D__ANDROID_API__=$API
+sed -i 's/CNF_EX_LIBS=-ldl -pthread//g;s/BIN_CFLAGS=-pie $(CNF_CFLAGS) $(CFLAGS)//g' Makefile
+make -j4
 make install
 
-
 done
 
-
diff --git a/scripts/android/build_sodium.sh b/scripts/android/build_sodium.sh
index e13541924..db21b8cda 100755
--- a/scripts/android/build_sodium.sh
+++ b/scripts/android/build_sodium.sh
@@ -1,21 +1,24 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
+. ./config.sh
 SODIUM_SRC_DIR=${WORKDIR}/libsodium
 SODIUM_BRANCH=1.0.16
-ORIGINAL_PATH=$PATH
 
 for arch in "aarch" "aarch64" "i686" "x86_64"
 do
 
-PREFIX=$WORKDIR/prefix_${arch}
-PATH="${TOOLCHAIN_BASE_DIR}_${arch}/bin:${ORIGINAL_PATH}"
+PREFIX=${WORKDIR}/prefix_${arch}
 
 case $arch in
-	"aarch"	) TARGET="arm";;
-	"i686"		) TARGET="x86";;
-	*		) TARGET="${arch}";;
+	"aarch"	) TARGET="arm"
+			  CC=armv7a-linux-androideabi${API}-clang
+			  CXX=armv7a-linux-androideabi${API}-clang++;;
+	"i686"		) TARGET="x86"
+			  CC=${arch}-linux-android${API}-clang
+			  CXX=${arch}-linux-android${API}-clang++;;
+	*		) TARGET="${arch}"
+			  CC=${arch}-linux-android${API}-clang
+			  CXX=${arch}-linux-android${API}-clang++;;
 esac 
 
 HOST="${TARGET}-linux-android"
@@ -24,8 +27,9 @@ rm -rf $SODIUM_SRC_DIR
 git clone https://github.com/jedisct1/libsodium.git $SODIUM_SRC_DIR -b $SODIUM_BRANCH
 cd $SODIUM_SRC_DIR
 ./autogen.sh
-CC=clang CXX=clang++ ./configure --prefix=${PREFIX} --host=${HOST} --enable-static --disable-shared
+./configure --prefix=${PREFIX} --host=${HOST} --enable-static --disable-shared
 make
 make install
 
 done
+
diff --git a/scripts/android/build_zmq.sh b/scripts/android/build_zmq.sh
index c161e6044..d05bd45b9 100755
--- a/scripts/android/build_zmq.sh
+++ b/scripts/android/build_zmq.sh
@@ -1,25 +1,28 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-TOOLCHAIN_BASE_DIR=${WORKDIR}/toolchain
+. ./config.sh
 ZMQ_SRC_DIR=$WORKDIR/libzmq
-ZMQ_BRANCH=master
-ZMQ_COMMIT_HASH=501d0815bf2b0abb93be8214fc66519918ef6c40
-ORIGINAL_PATH=$PATH
-
+ZMQ_BRANCH=v4.3.3
+ZMQ_COMMIT_HASH=04f5bbedee58c538934374dc45182d8fc5926fa3
 
 for arch in "aarch" "aarch64" "i686" "x86_64"
 do
 
 PREFIX=$WORKDIR/prefix_${arch}
-PATH="${TOOLCHAIN_BASE_DIR}_${arch}/bin:${ORIGINAL_PATH}"
 
 case $arch in
-	"aarch"	) TARGET="arm";;
-	"i686"		) TARGET="x86";;
-	*		) TARGET="${arch}";;
+	"aarch"	) TARGET="arm"
+			  ANDROID_CLANG=armv7a-linux-androideabi${API}-clang
+			  ANDROID_CLANGPP=armv7a-linux-androideabi${API}-clang++;;
+	"i686"		) TARGET="x86"
+			  ANDROID_CLANG=${arch}-linux-android${API}-clang
+			  ANDROID_CLANGPP=${arch}-linux-android${API}-clang++;;
+	*		) TARGET="${arch}"
+			  ANDROID_CLANG=${arch}-linux-android${API}-clang
+			  ANDROID_CLANGPP=${arch}-linux-android${API}-clang++;;
 esac 
 
+
 HOST="${TARGET}-linux-android"
 cd $WORKDIR
 rm -rf $ZMQ_SRC_DIR
@@ -27,7 +30,7 @@ git clone https://github.com/zeromq/libzmq.git ${ZMQ_SRC_DIR} -b ${ZMQ_BRANCH}
 cd $ZMQ_SRC_DIR
 git checkout ${ZMQ_COMMIT_HASH}
 ./autogen.sh
-CC=clang CXX=clang++ ./configure --prefix=${PREFIX} --host=${HOST} --enable-static --disable-shared
+ CC=${ANDROID_CLANG} CXX=${ANDROID_CLANGPP} ./configure --prefix=${PREFIX} --host=${HOST} --enable-static --disable-shared
 make
 make install
 
diff --git a/scripts/android/config.sh b/scripts/android/config.sh
new file mode 100644
index 000000000..183571716
--- /dev/null
+++ b/scripts/android/config.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+export API=21
+export WORKDIR=/opt/android
+export ANDROID_NDK_ZIP=${WORKDIR}/android-ndk-r20b.zip
+export ANDROID_NDK_ROOT=${WORKDIR}/android-ndk-r20b
+export ANDROID_NDK_HOME=$ANDROID_NDK_ROOT
+export TOOLCHAIN_DIR="${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/linux-x86_64"
+
+case :${PATH:=${TOOLCHAIN_DIR}/bin}: in
+(*:"${TOOLCHAIN_DIR}/bin":*) ;; (*)
+    export PATH=${TOOLCHAIN_DIR}/bin:$PATH
+esac;
diff --git a/scripts/android/finish_boost.sh b/scripts/android/finish_boost.sh
index 0016b3152..32f1d2e8d 100755
--- a/scripts/android/finish_boost.sh
+++ b/scripts/android/finish_boost.sh
@@ -1,9 +1,9 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
 ARCH=$1
-PREFIX="${WORKDIR}/prefix_${ARCH}"
-BOOST_SRC_DIR=$WORKDIR/boost_1_68_0
+PREFIX=$2
+BOOST_SRC_DIR=$3
 
 cd $BOOST_SRC_DIR
+
 ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --with-locale --build-dir=android --stagedir=android toolset=clang threading=multi threadapi=pthread target-os=android -sICONV_PATH=${PREFIX} install
diff --git a/scripts/android/init_boost.sh b/scripts/android/init_boost.sh
index ac2527b17..d33cf46b0 100755
--- a/scripts/android/init_boost.sh
+++ b/scripts/android/init_boost.sh
@@ -1,16 +1,19 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
 ARCH=$1
-PREFIX="${WORKDIR}/prefix_${ARCH}"
-BOOST_FILENAME=boost_1_68_0.tar.bz2
+PREFIX=$2
+BOOST_SRC_DIR=$3
+BOOST_FILENAME=$4
+BOOST_VERSION=$5
 BOOST_FILE_PATH=$WORKDIR/$BOOST_FILENAME
-BOOST_SRC_DIR=$WORKDIR/boost_1_68_0
+BOOST_SHA256="83bfc1507731a0906e387fc28b7ef5417d591429e51e788417fe9ff025e116b1"
 
 if [ ! -e "$BOOST_FILE_PATH" ]; then
-	wget https://dl.bintray.com/boostorg/release/1.68.0/source/$BOOST_FILENAME -O $BOOST_FILE_PATH
+	curl -L http://downloads.sourceforge.net/project/boost/boost/${BOOST_VERSION}/${BOOST_FILENAME} > $BOOST_FILE_PATH
 fi
 
+echo $BOOST_SHA256 $BOOST_FILE_PATH | sha256sum -c - || exit 1
+
 cd $WORKDIR
 rm -rf $BOOST_SRC_DIR
 tar -xvf $BOOST_FILE_PATH -C $WORKDIR
diff --git a/scripts/android/install_ndk.sh b/scripts/android/install_ndk.sh
index 619bdc118..ad9888e77 100755
--- a/scripts/android/install_ndk.sh
+++ b/scripts/android/install_ndk.sh
@@ -1,17 +1,8 @@
-# /bin/bash
+#!/bin/sh
 
-WORKDIR=/opt/android
-ANDROID_NDK_ZIP=${WORKDIR}/android-ndk-r17c.zip
-ANDROID_NDK_ROOT=${WORKDIR}/android-ndk-r17c
-TOOLCHAIN_DIR=${WORKDIR}/toolchain
-TOOLCHAIN_A32_DIR=${TOOLCHAIN_DIR}_aarch
-TOOLCHAIN_A64_DIR=${TOOLCHAIN_DIR}_aarch64
-TOOLCHAIN_x86_DIR=${TOOLCHAIN_DIR}_i686
-TOOLCHAIN_x86_64_DIR=${TOOLCHAIN_DIR}_x86_64
+. ./config.sh
+ANDROID_NDK_SHA256="8381c440fe61fcbb01e209211ac01b519cd6adf51ab1c2281d5daad6ca4c8c8c"
 
-wget https://dl.google.com/android/repository/android-ndk-r17c-linux-x86_64.zip -O /opt/android/android-ndk-r17c.zip
-unzip /opt/android/android-ndk-r17c.zip -d $WORKDIR
-${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py --arch arm64 --api 21 --install-dir ${TOOLCHAIN_A64_DIR} --stl=libc++
-${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py --arch arm --api 21 --install-dir ${TOOLCHAIN_A32_DIR} --stl=libc++
-${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py --arch x86 --api 21 --install-dir ${TOOLCHAIN_x86_DIR} --stl=libc++
-${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py --arch x86_64 --api 21 --install-dir ${TOOLCHAIN_x86_64_DIR} --stl=libc++
+curl https://dl.google.com/android/repository/android-ndk-r20b-linux-x86_64.zip -o ${ANDROID_NDK_ZIP}
+echo $ANDROID_NDK_SHA256 $ANDROID_NDK_ZIP | sha256sum -c || exit 1
+unzip /opt/android/android-ndk-r20b.zip -d $WORKDIR