diff --git a/install_third_party.sh b/install_third_party.sh
new file mode 100755
index 00000000..533bf5e3
--- /dev/null
+++ b/install_third_party.sh
@@ -0,0 +1,77 @@
+#!/bin/bash
+
+ROOT=$(dirname "$0")
+if [ ! -e "$ROOT"/third_party ]; then
+  # Potentially run from a different folder before packaging.
+  ROOT=$(dirname "$ROOT")
+fi
+
+if [ ! -e "$ROOT"/third_party ]; then
+  echo "Unable to find third_party sources!" 1>&2
+  exit 1
+fi
+
+ROOT=$(realpath "$ROOT")
+TMP=$(mktemp -d)
+trap "rm -rf $TMP" EXIT
+
+set -x
+set -e
+
+cd $TMP
+
+# Check out and install gyp locally
+git clone https://chromium.googlesource.com/external/gyp gyp_new
+rm -rf "$ROOT"/third_party/gyp
+mv gyp_new/pylib/gyp "$ROOT"/third_party/gyp
+rm -rf gyp_new
+
+# Check out and install jsmn locally
+git clone https://github.com/zserge/jsmn jsmn_new
+rm -rf "$ROOT"/third_party/jsmn
+mkdir "$ROOT"/third_party/jsmn
+cp -R jsmn_new/* "$ROOT"/third_party/jsmn
+rm -rf jsmn_new
+
+# Check out and install stringencoders locally
+# NOTE: this is new for v3.2
+git clone https://github.com/client9/stringencoders.git stringencoders_git
+(
+  cd stringencoders_git
+  ./bootstrap.sh
+  ./configure
+  cd src
+  make modp_b64_data.h
+  make modp_b64.c
+  cd ..
+  ./configure --with-b64wchars='-_='
+  cd src
+  make modp_b64w_data.h
+  make modp_b64w.c
+  cd ..
+  mkdir -p "$ROOT"/third_party/stringencoders/src
+  cp src/modp_b64.c "$ROOT"/third_party/stringencoders/src/modp_b64.cpp
+  cp src/modp_b64.h src/modp_b64_data.h "$ROOT"/third_party/stringencoders/src/
+  cp src/modp_b64w.c "$ROOT"/third_party/stringencoders/src/modp_b64w.cpp
+  cp src/modp_b64w.h src/modp_b64w_data.h "$ROOT"/third_party/stringencoders/src/
+  cp src/extern_c_begin.h "$ROOT"/third_party/stringencoders/src/
+  cp src/extern_c_end.h "$ROOT"/third_party/stringencoders/src/
+  cp src/modp_stdint.h "$ROOT"/third_party/stringencoders/src/
+  >"$ROOT"/third_party/stringencoders/src/config.h
+)
+
+# Check out and install googletest and googlemock locally
+# NOTE: this is new for v3.2
+git clone https://github.com/google/googletest.git googletest_git
+(cd googletest_git && git checkout release-1.8.0)
+rm -rf "$ROOT"/third_party/gmock
+rm -rf "$ROOT"/third_party/googletest
+mv googletest_git "$ROOT"/third_party/googletest
+
+# Check out and install protobuf locally
+# NOTE: the tarball is fetched from a different location for v3.2
+wget https://github.com/google/protobuf/releases/download/v2.5.0/protobuf-2.5.0.tar.gz
+tar xzf protobuf-2.5.0.tar.gz
+(cd protobuf-2.5.0 && ./configure)
+rm -rf "$ROOT"/third_party/protobuf
+mv protobuf-2.5.0 "$ROOT"/third_party/protobuf