try to specify during npm

bin/compile

@@ -42,7 +42,7 @@ fi
 # install dependencies with npm
 echo "-----> Installing dependencies with npm $NPM_VERSION"
 cd $BUILD_DIR
-HOME="$BUILD_DIR" $VENDORED_NODE/node $VENDORED_NPM/cli.js install 2>&1 | sed -u 's/^/       /'
+HOME="$BUILD_DIR" INCLUDE_PATH="$VENDORED_NODE/include" $VENDORED_NODE/node $VENDORED_NPM/cli.js install 2>&1 | sed -u 's/^/       /'
 if [ "${PIPESTATUS[*]}" != "0 0" ]; then
   echo " !     Failed to install dependencies with npm"
   exit 1