diff --git a/react-packager/src/Packager/Package.js b/react-packager/src/Packager/Package.js
index 3ef9c528..5d9b201c 100644
--- a/react-packager/src/Packager/Package.js
+++ b/react-packager/src/Packager/Package.js
@@ -7,6 +7,7 @@ var UglifyJS = require('uglify-js');
 module.exports = Package;
 
 function Package(sourceMapUrl) {
+  this._finalized = false;
   this._modules = [];
   this._sourceMapUrl = sourceMapUrl;
 }
@@ -40,23 +41,56 @@ Package.prototype.finalize = function(options) {
 
   Object.freeze(this._modules);
   Object.seal(this._modules);
+  this._finalized = true;
 };
 
-Package.prototype.getSource = function(options) {
-  if (!this._source) {
-    options = options || {};
+Package.prototype._assertFinalized = function() {
+  if (!this._finalized) {
+    throw new Error('Package need to be finalized before getting any source');
+  }
+};
+
+Package.prototype._getSource = function() {
+  if (this._source == null) {
     this._source = _.pluck(this._modules, 'transformedCode').join('\n');
-    if (options.inlineSourceMap) {
-      var sourceMap = this.getSourceMap({excludeSource: true});
-      this._source += '\nRAW_SOURCE_MAP = ' + JSON.stringify(sourceMap) + ';';
-    }
-    this._source += '\n\/\/@ sourceMappingURL=' + this._sourceMapUrl;
   }
   return this._source;
 };
 
+Package.prototype._getInlineSourceMap = function() {
+  if (this._inlineSourceMap == null) {
+    var sourceMap = this.getSourceMap({excludeSource: true});
+    this._inlineSourceMap = '\nRAW_SOURCE_MAP = ' +
+      JSON.stringify(sourceMap) + ';';
+  }
+
+  return this._inlineSourceMap;
+};
+
+Package.prototype.getSource = function(options) {
+  this._assertFinalized();
+
+  options = options || {};
+
+  if (options.minify) {
+    return this.getMinifiedSourceAndMap().code;
+  }
+
+  var source = this._getSource();
+
+  if (options.inlineSourceMap) {
+    source += this._getInlineSourceMap();
+  }
+
+  source += '\n\/\/@ sourceMappingURL=' + this._sourceMapUrl;
+
+  return source;
+};
+
 Package.prototype.getMinifiedSourceAndMap = function() {
-  var source = this.getSource({inlineSourceMap: false});
+  this._assertFinalized();
+
+  var source = this._getSource();
   try {
     return UglifyJS.minify(source, {
       fromString: true,
@@ -88,6 +122,8 @@ Package.prototype.getMinifiedSourceAndMap = function() {
 };
 
 Package.prototype.getSourceMap = function(options) {
+  this._assertFinalized();
+
   options = options || {};
   var mappings = this._getMappings();
   var map = {
@@ -102,7 +138,6 @@ Package.prototype.getSourceMap = function(options) {
   return map;
 };
 
-
 Package.prototype._getMappings = function() {
   var modules = this._modules;
 
diff --git a/react-packager/src/Server/index.js b/react-packager/src/Server/index.js
index 54eb8e22..053aa033 100644
--- a/react-packager/src/Server/index.js
+++ b/react-packager/src/Server/index.js
@@ -74,7 +74,10 @@ Server.prototype._rebuildPackages = function() {
     var options = getOptionsFromUrl(key);
     packages[key] = buildPackage(options).then(function(p) {
       // Make a throwaway call to getSource to cache the source string.
-      p.getSource({inlineSourceMap: options.dev});
+      p.getSource({
+        inlineSourceMap: options.dev,
+        minify: options.minify,
+      });
       return p;
     });
   });
@@ -164,7 +167,10 @@ Server.prototype.processRequest = function(req, res, next) {
     building.then(
     function(p) {
       if (requestType === 'bundle') {
-        res.end(p.getSource({inlineSourceMap: options.dev}));
+        res.end(p.getSource({
+          inlineSourceMap: options.dev,
+          minify: options.minify,
+        }));
         Activity.endEvent(startReqEventId);
       } else if (requestType === 'map') {
         res.end(JSON.stringify(p.getSourceMap()));
@@ -190,10 +196,9 @@ function getOptionsFromUrl(reqUrl) {
   return {
     sourceMapUrl: urlObj.pathname.replace(/\.bundle$/, '.map'),
     main: main,
-    dev: urlObj.query.dev === 'true' ||
-      urlObj.query.dev === '1',
-    runModule: urlObj.query.runModule === 'true' ||
-      urlObj.query.runModule === '1' ||
+    dev: getBoolOptionFromQuery(urlObj.query, 'dev'),
+    minify: getBoolOptionFromQuery(urlObj.query, 'minify'),
+    runModule: getBoolOptionFromQuery(urlObj.query, 'runModule') ||
       // Backwards compatibility.
       urlObj.pathname.split('.').some(function(part) {
         return part === 'runModule';
@@ -201,6 +206,10 @@ function getOptionsFromUrl(reqUrl) {
   };
 }
 
+function getBoolOptionFromQuery(query, opt) {
+  return query[opt] === 'true' || query[opt] === '1';
+}
+
 function handleError(res, error) {
   res.writeHead(500, {
     'Content-Type': 'application/json; charset=UTF-8',