diff --git a/local-cli/runAndroid/runAndroid.js b/local-cli/runAndroid/runAndroid.js
index 234530c1041..cd21b6ac29c 100644
--- a/local-cli/runAndroid/runAndroid.js
+++ b/local-cli/runAndroid/runAndroid.js
@@ -349,25 +349,35 @@ function runOnAllDevices(
 }
 
 function startServerInNewWindow(port) {
-  const scriptFile = /^win/.test(process.platform)
+  // set up OS-specific filenames and commands
+  const isWindows = /^win/.test(process.platform);
+  const scriptFile = isWindows
     ? 'launchPackager.bat'
     : 'launchPackager.command';
+  const packagerEnvFilename = isWindows
+    ? '.packager.bat'
+    : '.packager.env';
+  const portExportContent = isWindows
+    ? `set RCT_METRO_PORT=${port}`
+    : `export RCT_METRO_PORT=${port}`;
+
+  // set up the launchpackager.(command|bat) file
   const scriptsDir = path.resolve(__dirname, '..', '..', 'scripts');
   const launchPackagerScript = path.resolve(scriptsDir, scriptFile);
   const procConfig = {cwd: scriptsDir};
   const terminal = process.env.REACT_TERMINAL;
 
-  // setup the .packager.env file to ensure the packager starts on the right port
+  // set up the .packager.(env|bat) file to ensure the packager starts on the right port
   const packagerEnvFile = path.join(
     __dirname,
     '..',
     '..',
     'scripts',
-    '.packager.env',
+    packagerEnvFilename
   );
-  const content = `export RCT_METRO_PORT=${port}`;
+  
   // ensure we overwrite file by passing the 'w' flag
-  fs.writeFileSync(packagerEnvFile, content, {encoding: 'utf8', flag: 'w'});
+  fs.writeFileSync(packagerEnvFile, portExportContent, {encoding: 'utf8', flag: 'w'});
 
   if (process.platform === 'darwin') {
     if (terminal) {
diff --git a/scripts/launchPackager.bat b/scripts/launchPackager.bat
index 09f1de98737..b85ecc6822c 100644
--- a/scripts/launchPackager.bat
+++ b/scripts/launchPackager.bat
@@ -5,6 +5,7 @@
 
 @echo off
 title Metro Bundler
+call .packager.bat
 node "%~dp0..\local-cli\cli.js" start
 pause
 exit