On Windows force a 32 bit build until nodejs 64 bit is supported

src/extensibility/node/npm-installer.js

@@ -37,22 +37,13 @@ var Errors = {
  * Private function to run "npm install --production" command in the extension directory.
  *
  * @param {string} installDirectory Directory to remove
+ * @param {array} npmOptions can contain additional options like `--production` or `--proxy http://127.0.0.1:8888`
  * @param {function} callback NodeJS style callback to call after finish
  */
 function _performNpmInstall(installDirectory, npmOptions, callback) {
     var npmPath = path.resolve(path.dirname(require.resolve("npm")), "..", "bin", "npm-cli.js");
-    var args = [npmPath, "install"];
-
-    // npmOptions can contain additional args like { "production": true, "proxy": "http://127.0.0.1:8888" }
-    Object.keys(npmOptions).forEach(function (key) {
-        var value = npmOptions[key];
-        if (value === true) {
-            args.push("--" + key);
-        } else if (typeof value === "string" && value.length > 0) {
-            args.push("--" + key, value);
-        }
-    });
-
+    var args = [npmPath, "install"].concat(npmOptions);
+
     console.log("running npm " + args.slice(1).join(" ") + " in " + installDirectory);
 
     var child = spawn(process.execPath, args, { cwd: installDirectory });

src/extensibility/node/package-validator.js

@@ -295,10 +295,20 @@ function extractAndValidateFiles(zipPath, extractDir, options, callback) {
                     errors.push([Errors.MISSING_MAIN, zipPath, mainJS]);
                 }
 
-                performNpmInstallIfRequired({
-                    production: true,
-                    proxy: options.proxy
-                }, {
+                var npmOptions = ['--production'];
+
+                if (options.proxy) {
+                    npmOptions.push('--proxy ' + options.proxy);
+                }
+
+                if (process.platform.startsWith('win')) {
+                    // On Windows force a 32 bit build until nodejs 64 bit is supported.
+                    npmOptions.push('--arch=ia32');
+                    npmOptions.push('--npm_config_arch=ia32');
+                    npmOptions.push('--npm_config_target_arch=ia32');
+                }
+
+                performNpmInstallIfRequired(npmOptions, {
                     errors: errors,
                     metadata: metadata,
                     commonPrefix: commonPrefix,