diff --git a/.gitmodules b/.gitmodules
index daa6a58c2dc..e25104d077a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -17,3 +17,6 @@
 	path = contracts/libc++/upstream
 	url = https://github.com/EOSIO/libcxx.git
 	branch = eosio
+[submodule "externals/binaryen"]
+	path = externals/binaryen
+	url = https://github.com/EOSIO/binaryen
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2bde96a85f2..2e8a7dc75e0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -164,6 +164,8 @@ if(ENABLE_COVERAGE_TESTING)
   find_program( GENHTML_PATH NAMES genhtml)
 endif()
 
+add_subdirectory( externals )
+
 include(wasm)
 if(WASM_TOOLCHAIN)
   message(STATUS "Using WASM clang => " ${WASM_CLANG})
diff --git a/CMakeModules/wasm.cmake b/CMakeModules/wasm.cmake
index 464d1748066..337ad37b367 100644
--- a/CMakeModules/wasm.cmake
+++ b/CMakeModules/wasm.cmake
@@ -26,35 +26,8 @@ else()
   set(WASM_LLVM_LINK $ENV{WASM_LLVM_LINK})
 endif()
 
-if( NOT ("${WASM_CLANG}" STREQUAL "" OR "${WASM_LLC}" STREQUAL "" OR "${WASM_LLVM_LINK}" STREQUAL "") )
-  if( NOT "${BINARYEN_ROOT}" STREQUAL "" )
-
-    if(EXISTS "${BINARYEN_ROOT}/bin/s2wasm")
-
-      set(BINARYEN_BIN ${BINARYEN_ROOT}/bin)
-
-    endif()
-
-  else()
-
-    message(STATUS "BINARYEN_BIN not defined looking in PATH")
-    find_path(BINARYEN_BIN
-              NAMES s2wasm
-              ENV PATH )
-    if (BINARYEN_BIN AND NOT EXISTS ${BINARYEN_ROOT}/s2wasm)
-
-      unset(BINARYEN_BIN)
-
-    endif()
-
-  endif()
-
-  message(STATUS "BINARYEN_BIN => " ${BINARYEN_BIN})
-
-endif()
-
 # TODO: Check if compiler is able to generate wasm32
-if( NOT ("${WASM_CLANG}" STREQUAL "" OR "${WASM_LLC}" STREQUAL "" OR "${WASM_LLVM_LINK}" STREQUAL "" OR NOT BINARYEN_BIN) )
+if( NOT ("${WASM_CLANG}" STREQUAL "" OR "${WASM_LLC}" STREQUAL "" OR "${WASM_LLVM_LINK}" STREQUAL "") )
   set(WASM_TOOLCHAIN TRUE)
 endif()
 
@@ -199,7 +172,7 @@ macro(add_wast_executable)
 
   add_custom_command(OUTPUT ${DESTINATION_FOLDER}/${target}.wast
     DEPENDS ${target}.s
-    COMMAND ${BINARYEN_BIN}/s2wasm -o ${DESTINATION_FOLDER}/${target}.wast -s 4096 ${MAX_MEMORY_PARAM} ${target}.s
+    COMMAND $<TARGET_FILE:eosio-s2wasm> -o ${DESTINATION_FOLDER}/${target}.wast -s 4096 ${MAX_MEMORY_PARAM} ${target}.s
     COMMENT "Generating WAST ${target}.wast"
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     VERBATIM
diff --git a/eosio_build.sh b/eosio_build.sh
index 8c62bbaea5c..e0406cd6fdc 100755
--- a/eosio_build.sh
+++ b/eosio_build.sh
@@ -81,7 +81,6 @@
 		esac
 			
 		export BOOST_ROOT=${HOME}/opt/boost_1_66_0
-		export BINARYEN_BIN=${HOME}/opt/binaryen/bin
 		export OPENSSL_ROOT_DIR=/usr/include/openssl
 		export OPENSSL_LIBRARIES=/usr/include/openssl
 		export WASM_LLVM_CONFIG=${HOME}/opt/wasm/bin/llvm-config
@@ -93,7 +92,6 @@
 	if [ $ARCH == "Darwin" ]; then
 		OPENSSL_ROOT_DIR=/usr/local/opt/openssl
 		OPENSSL_LIBRARIES=/usr/local/opt/openssl/lib
-		BINARYEN_BIN=/usr/local/binaryen/bin/
 		WASM_LLVM_CONFIG=/usr/local/wasm/bin/llvm-config
 		CXX_COMPILER=clang++
 		C_COMPILER=clang
@@ -122,7 +120,7 @@
 	# Build EOS
 	$CMAKE -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} \
 	-DCMAKE_C_COMPILER=${C_COMPILER} -DWASM_LLVM_CONFIG=${WASM_LLVM_CONFIG} \
-	-DBINARYEN_BIN=${BINARYEN_BIN} -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR} \
+	-DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR} \
 	-DOPENSSL_LIBRARIES=${OPENSSL_LIBRARIES} ..
 	if [ $? -ne 0 ]; then
 		printf "\n\t>>>>>>>>>>>>>>>>>>>> CMAKE building EOSIO has exited with the above error.\n\n"
diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
new file mode 100644
index 00000000000..4fac3528746
--- /dev/null
+++ b/externals/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory( binaryen )
diff --git a/externals/binaryen b/externals/binaryen
new file mode 160000
index 00000000000..0b980a9e877
--- /dev/null
+++ b/externals/binaryen
@@ -0,0 +1 @@
+Subproject commit 0b980a9e87740db4d657ee38b2668da35752264e
diff --git a/scripts/eosio_build_amazon.sh b/scripts/eosio_build_amazon.sh
index b2e51cfba02..efa49cf05e2 100644
--- a/scripts/eosio_build_amazon.sh
+++ b/scripts/eosio_build_amazon.sh
@@ -172,27 +172,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		$CMAKE . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang with EXPERIMENTAL WASM support:
diff --git a/scripts/eosio_build_darwin.sh b/scripts/eosio_build_darwin.sh
index 5242462687b..ab253023ed2 100644
--- a/scripts/eosio_build_darwin.sh
+++ b/scripts/eosio_build_darwin.sh
@@ -181,26 +181,6 @@
 		printf "\tsecp256k1 found at /usr/local/lib/\n"
 	fi
 
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -e /usr/local/binaryen/bin/binaryen.js ]; then
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		sudo mkdir /usr/local/binaryen
-		sudo mv ${TEMP_DIR}/binaryen/bin /usr/local/binaryen
-		sudo ln -s /usr/local/binaryen/bin/* /usr/local
-		sudo rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at /usr/local/binaryen/bin/\n"
-	fi
-
 	printf "\n\tChecking for WASM\n"
 	if [ ! -d /usr/local/wasm/bin ]; then
 		# Build LLVM and clang for WASM:
diff --git a/scripts/eosio_build_fedora.sh b/scripts/eosio_build_fedora.sh
index 94a83e93854..159fb37d34d 100644
--- a/scripts/eosio_build_fedora.sh
+++ b/scripts/eosio_build_fedora.sh
@@ -145,27 +145,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang with EXPERIMENTAL WASM support:
diff --git a/scripts/eosio_build_ubuntu.sh b/scripts/eosio_build_ubuntu.sh
index 6c3926ea26a..c394167d561 100644
--- a/scripts/eosio_build_ubuntu.sh
+++ b/scripts/eosio_build_ubuntu.sh
@@ -127,27 +127,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang for WASM:
diff --git a/tools/eosiocpp.in b/tools/eosiocpp.in
index 4664ecfc0fd..8a55ed0c034 100755
--- a/tools/eosiocpp.in
+++ b/tools/eosiocpp.in
@@ -40,8 +40,8 @@ function build_contract {
     @WASM_LLVM_LINK@ -o $workdir/linked.bc $workdir/built/*
 #    echo @WASM_LLC@ --asm-verbose=false -o $workdir/assembly.s $workdir/linked.bc
     @WASM_LLC@ --asm-verbose=false -o $workdir/assembly.s $workdir/linked.bc
-#  echo @BINARYEN_BIN@/s2wasm -o $outname -s 16384 $workdir/assembly.s
-    @BINARYEN_BIN@/s2wasm -o $outname -s 16384 $workdir/assembly.s
+#  echo ${EOSIO_INSTALL_DIR}/bin/eosio-s2wasm -o $outname -s 16384 $workdir/assembly.s
+    ${EOSIO_INSTALL_DIR}/bin/eosio-s2wasm -o $outname -s 16384 $workdir/assembly.s
 
 #    echo rm -rf $workdir
     rm -rf $workdir