diff --git a/History.md b/History.md
index e526cb2bc4..3c9f001b04 100644
--- a/History.md
+++ b/History.md
@@ -16,6 +16,11 @@
 * Allow using authType in Facebook login [PR #5694](https://github.com/meteor/meteor/pull/5694)
 
 * Adds flush() method to Tracker to force recomputation [PR #4710](https://github.com/meteor/meteor/pull/4710)
+* Adds `defineMutationMethods` option (default: true) to `new Mongo.Collection` to override default behavior that sets up mutation methods (/collection/[insert|update...]) [PR #5778](https://github.com/meteor/meteor/pull/5778)
+* Allow overridding the default warehouse url by specifying `METEOR_WAREHOUSE_URLBASE` [PR #7054](https://github.com/meteor/meteor/pull/7054)
+* Allow `_id` in `$setOnInsert` in Minimongo: https://github.com/meteor/meteor/pull/7066
+* Added support for `$eq` to Minimongo: https://github.com/meteor/meteor/pull/4235
+* Insert a `Date` header into emails by default: https://github.com/meteor/meteor/pull/6916/files
 
 * DDP callbacks are now batched on the client side. This means that after a DDP message arrives, the local DDP client will batch changes for a minimum of 5ms (configurable via `bufferedWritesInterval`) and a maximum of 500ms (configurable via `bufferedWritesMaxAge`) before calling any callbacks (such as cursor observe callbacks).
 
@@ -71,16 +76,14 @@
 * The `npm-bcrypt` package has been upgraded to use the latest version
   (0.8.5) of the `bcrypt` npm package.
 
-* `Match.Optional` only passes if the value is `null` or the specified
-  type, whereas previously it accepted `undefined`. Use `Match.Maybe` to
-  allow `undefined`. #6735
-
 * Compiler plugins can call `addJavaScript({ path })` multiple times with
   different paths for the same source file, and `module.id` will reflect
   this `path` instead of the source path, if they are different. #6806
 
 * Fixed bugs: https://github.com/meteor/meteor/milestones/Release%201.3.2
 
+* Fixed unintended change to `Match.Optional` which caused it to behave the same as the new `Match.Maybe` and incorrectly matching `null` where it previously would not have allowed it. #6735
+
 ## v1.3.1
 
 * Long isopacket node_modules paths have been shortened, fixing upgrade
@@ -303,6 +306,10 @@
 * Improve automatic blocking of URLs in attribute values to also
   include `vbscript:` URLs.
 
+### Check
+
+* Introduced new matcher `Match.Maybe(type)` which will also match (permit) `null` in addition to `undefined`.  This is a suggested replacement (where appropriate) for `Match.Optional` which did not permit `null`.  This prevents the need to use `Match.OneOf(null, undefined, type)`. #6220 
+
 ### Testing
 
 * Packages can now be marked as `testOnly` to only run as part of app
diff --git a/packages/allow-deny/allow-deny.js b/packages/allow-deny/allow-deny.js
index b8cf8159dc..819a4dfc59 100644
--- a/packages/allow-deny/allow-deny.js
+++ b/packages/allow-deny/allow-deny.js
@@ -70,8 +70,9 @@ CollectionPrototype.deny = function(options) {
   addValidator(this, 'deny', options);
 };
 
-CollectionPrototype._defineMutationMethods = function() {
+CollectionPrototype._defineMutationMethods = function(options) {
   const self = this;
+  options = options || {};
 
   // set to true once we call any allow or deny methods. If true, use
   // allow/deny semantics. If false, use insecure mode semantics.
@@ -99,12 +100,26 @@ CollectionPrototype._defineMutationMethods = function() {
   // "Meteor:Mongo:insert/NAME"?
   self._prefix = '/' + self._name + '/';
 
-  // mutation methods
-  if (self._connection) {
+  // Mutation Methods
+  // Minimongo on the server gets no stubs; instead, by default
+  // it wait()s until its result is ready, yielding.
+  // This matches the behavior of macromongo on the server better.
+  // XXX see #MeteorServerNull
+  if (self._connection && (self._connection === Meteor.server || Meteor.isClient)) {
     const m = {};
 
     _.each(['insert', 'update', 'remove'], function (method) {
-      m[self._prefix + method] = function (/* ... */) {
+      const methodName = self._prefix + method;
+
+      if (options.useExisting) {
+        const handlerPropName = Meteor.isClient ? '_methodHandlers' : 'method_handlers';
+        // Do not try to create additional methods if this has already been called.
+        // (Otherwise the .methods() call below will throw an error.)
+        if (self._connection[handlerPropName] &&
+          typeof self._connection[handlerPropName][methodName] === 'function') return;
+      }
+
+      m[methodName] = function (/* ... */) {
         // All the methods do their own validation, instead of using check().
         check(arguments, [Match.Any]);
         const args = _.toArray(arguments);
@@ -183,12 +198,8 @@ CollectionPrototype._defineMutationMethods = function() {
         }
       };
     });
-    // Minimongo on the server gets no stubs; instead, by default
-    // it wait()s until its result is ready, yielding.
-    // This matches the behavior of macromongo on the server better.
-    // XXX see #MeteorServerNull
-    if (Meteor.isClient || self._connection === Meteor.server)
-      self._connection.methods(m);
+
+    self._connection.methods(m);
   }
 };
 
diff --git a/packages/email/email.js b/packages/email/email.js
index d4eda67e75..82bd8d62a0 100644
--- a/packages/email/email.js
+++ b/packages/email/email.js
@@ -178,6 +178,10 @@ Email.send = function (options) {
       mc.addHeader(name, value);
     });
 
+    if (!options.headers.hasOwnProperty('Date')) {
+      mc.addHeader('Date', new Date().toUTCString().replace(/GMT/, '+0000'));
+    }
+
     _.each(options.attachments, function(attachment){
       mc.addAttachment(attachment);
     });
diff --git a/packages/email/email_tests.js b/packages/email/email_tests.js
index 286440232c..c5faade643 100644
--- a/packages/email/email_tests.js
+++ b/packages/email/email_tests.js
@@ -13,7 +13,10 @@ Tinytest.add("email - dev mode smoke test", function (test) {
       cc: ["friends@example.com", "enemies@example.com"],
       subject: "This is the subject",
       text: "This is the body\nof the message\nFrom us.",
-      headers: {'X-Meteor-Test': 'a custom header'}
+      headers: {
+        'X-Meteor-Test': 'a custom header',
+        'Date': 'dummy',
+      },
     });
     // XXX brittle if mailcomposer changes header order, etc
     test.equal(stream.getContentsAsString("utf8"),
@@ -22,6 +25,7 @@ Tinytest.add("email - dev mode smoke test", function (test) {
                  "environment variable.)\n" +
                "MIME-Version: 1.0\r\n" +
                "X-Meteor-Test: a custom header\r\n" +
+               "Date: dummy\r\n" +
                "From: foo@example.com\r\n" +
                "To: bar@example.com\r\n" +
                "Cc: friends@example.com, enemies@example.com\r\n" +
@@ -52,6 +56,20 @@ Tinytest.add("email - dev mode smoke test", function (test) {
                "\r\n" +
                "body\r\n" +
                "====== END MAIL #1 ======\n");
+    
+    // Test if date header is automaticall generated, if not specified
+    Email.send({
+      from: "foo@example.com",
+      to: "bar@example.com",
+      subject: "This is the subject",
+      text: "This is the body\nof the message\nFrom us.",
+      headers: {
+        'X-Meteor-Test': 'a custom header',
+      },
+    });
+
+    test.matches(stream.getContentsAsString("utf8"),
+                 /^Date: .+$/m);
   } finally {
     EmailTest.restoreOutputStream();
   }
diff --git a/packages/minimongo/minimongo_server_tests.js b/packages/minimongo/minimongo_server_tests.js
index 5443659567..38cc1476da 100644
--- a/packages/minimongo/minimongo_server_tests.js
+++ b/packages/minimongo/minimongo_server_tests.js
@@ -527,6 +527,10 @@ Tinytest.add("minimongo - sorter and projection combination", function (test) {
     // XXX this test should be F, but since it is so hard to be precise in
     // floating point math, the current implementation falls back to T
     T({ a: { $gt: 9.999999999999999, $lt: 10 }, x: 1 }, { $set: { x: 1 } }, "very close $gt and $lt");
+    T({ a: { $eq: 5 } }, { $set: { a: 5 } }, "set of $eq");
+    T({ a: { $eq: 5 }, b: { $eq: 7 } }, { $set: { a: 5 } }, "set of $eq with other $eq");
+    F({ a: { $eq: 5 } }, { $set: { a: 4 } }, "set below of $eq");
+    F({ a: { $eq: 5 } }, { $set: { a: 6 } }, "set above of $eq");
     T({ a: { $ne: 5 } }, { $unset: { a: 1 } }, "unset of $ne");
     T({ a: { $ne: 5 } }, { $set: { a: 1 } }, "set of $ne");
     T({ a: { $ne: "some string" }, x: 1 }, { $set: { x: 1 } }, "$ne dummy");
@@ -549,6 +553,11 @@ Tinytest.add("minimongo - sorter and projection combination", function (test) {
 
   Tinytest.add("minimongo - can selector become true by modifier - $-nonscalar selectors and simple tests", function (t) {
     test = t;
+    T({ a: { $eq: { x: 5 } } }, { $set: { 'a.x': 5 } }, "set of $eq");
+    // XXX this test should be F, but it is not implemented yet
+    T({ a: { $eq: { x: 5 } } }, { $set: { 'a.x': 4 } }, "set of $eq");
+    // XXX this test should be F, but it is not implemented yet
+    T({ a: { $eq: { x: 5 } } }, { $set: { 'a.y': 4 } }, "set of $eq");
     T({ a: { $ne: { x: 5 } } }, { $set: { 'a.x': 3 } }, "set of $ne");
     // XXX this test should be F, but it is not implemented yet
     T({ a: { $ne: { x: 5 } } }, { $set: { 'a.x': 5 } }, "set of $ne");
@@ -560,4 +569,3 @@ Tinytest.add("minimongo - sorter and projection combination", function (test) {
     T({ a: { $ne: { a: 2 } } }, { $set: { a: { a: 2 } } }, "$ne object");
   });
 })();
-
diff --git a/packages/minimongo/minimongo_tests.js b/packages/minimongo/minimongo_tests.js
index 4be1670fbb..5a77df7652 100644
--- a/packages/minimongo/minimongo_tests.js
+++ b/packages/minimongo/minimongo_tests.js
@@ -510,6 +510,23 @@ Tinytest.add("minimongo - selector_compiler", function (test) {
     });
   });
 
+  // $eq
+  nomatch({a: {$eq: 1}}, {a: 2});
+  match({a: {$eq: 2}}, {a: 2});
+  nomatch({a: {$eq: [1]}}, {a: [2]});
+
+  match({a: {$eq: [1, 2]}}, {a: [1, 2]});
+  match({a: {$eq: 1}}, {a: [1, 2]});
+  match({a: {$eq: 2}}, {a: [1, 2]});
+  nomatch({a: {$eq: 3}}, {a: [1, 2]});
+  match({'a.b': {$eq: 1}}, {a: [{b: 1}, {b: 2}]});
+  match({'a.b': {$eq: 2}}, {a: [{b: 1}, {b: 2}]});
+  nomatch({'a.b': {$eq: 3}}, {a: [{b: 1}, {b: 2}]});
+
+  match({a: {$eq: {x: 1}}}, {a: {x: 1}});
+  nomatch({a: {$eq: {x: 1}}}, {a: {x: 2}});
+  nomatch({a: {$eq: {x: 1}}}, {a: {x: 1, y: 2}});
+
   // $ne
   match({a: {$ne: 1}}, {a: 2});
   nomatch({a: {$ne: 2}}, {a: 2});
@@ -2085,6 +2102,23 @@ Tinytest.add("minimongo - modify", function (test) {
     exceptionWithQuery(doc, {}, mod);
   };
 
+  var upsert = function (query, mod, expected) {
+    var coll = new LocalCollection;
+    
+    var result = coll.upsert(query, mod);
+    
+    var actual = coll.findOne();
+    
+    if (expected._id) {
+      test.equal(result.insertedId, expected._id);
+    }
+    else {
+      delete actual._id;
+    }
+    
+    test.equal(actual, expected);
+  };
+  
   // document replacement
   modify({}, {}, {});
   modify({a: 12}, {}, {}); // tested against mongodb
@@ -2406,6 +2440,13 @@ Tinytest.add("minimongo - modify", function (test) {
   exception({}, {$rename: {'a.b': 'a.b'}});
   modify({a: 12, b: 13}, {$rename: {a: 'b'}}, {b: 12});
 
+  // $setOnInsert
+  modify({a: 0}, {$setOnInsert: {a: 12}}, {a: 0});
+  upsert({a: 12}, {$setOnInsert: {b: 12}}, {a: 12, b: 12});
+  upsert({a: 12}, {$setOnInsert: {_id: 'test'}}, {_id: 'test', a: 12});
+  
+  exception({}, {$set: {_id: 'bad'}});
+  
   // $bit
   // unimplemented
 
diff --git a/packages/minimongo/modify.js b/packages/minimongo/modify.js
index 3b49ff0443..348e31a51e 100644
--- a/packages/minimongo/modify.js
+++ b/packages/minimongo/modify.js
@@ -49,7 +49,7 @@ LocalCollection._modify = function (doc, mod, options) {
           throw MinimongoError("An empty update path is not valid.");
         }
 
-        if (keypath === '_id') {
+        if (keypath === '_id' && op !== '$setOnInsert') {
           throw MinimongoError("Mod on _id not allowed");
         }
 
diff --git a/packages/minimongo/selector.js b/packages/minimongo/selector.js
index 145487be82..4e80e57d32 100644
--- a/packages/minimongo/selector.js
+++ b/packages/minimongo/selector.js
@@ -255,15 +255,13 @@ var operatorBranchedMatcher = function (valueSelector, matcher, isRoot) {
 
   var operatorMatchers = [];
   _.each(valueSelector, function (operand, operator) {
-    // XXX we should actually implement $eq, which is new in 2.6
     var simpleRange = _.contains(['$lt', '$lte', '$gt', '$gte'], operator) &&
       _.isNumber(operand);
-    var simpleInequality = operator === '$ne' && !_.isObject(operand);
+    var simpleEquality = _.contains(['$ne', '$eq'], operator) && !_.isObject(operand);
     var simpleInclusion = _.contains(['$in', '$nin'], operator) &&
       _.isArray(operand) && !_.any(operand, _.isObject);
 
-    if (! (operator === '$eq' || simpleRange ||
-           simpleInclusion || simpleInequality)) {
+    if (! (simpleRange || simpleInclusion || simpleEquality)) {
       matcher._isSimple = false;
     }
 
@@ -380,6 +378,10 @@ var invertBranchedMatcher = function (branchedMatcher) {
 // "match each branched value independently and combine with
 // convertElementMatcherToBranchedMatcher".
 var VALUE_OPERATORS = {
+  $eq: function (operand) {
+    return convertElementMatcherToBranchedMatcher(
+      equalityElementMatcher(operand));
+  },
   $not: function (operand, valueSelector, matcher) {
     return invertBranchedMatcher(compileValueSelector(operand, matcher));
   },
diff --git a/packages/minimongo/selector_modifier.js b/packages/minimongo/selector_modifier.js
index 7ea8ed36c5..54b37df68b 100644
--- a/packages/minimongo/selector_modifier.js
+++ b/packages/minimongo/selector_modifier.js
@@ -141,7 +141,9 @@ Minimongo.Matcher.prototype.matchingDocument = function () {
         // if there is a strict equality, there is a good
         // chance we can use one of those as "matching"
         // dummy value
-        if (valueSelector.$in) {
+        if (valueSelector.$eq) {
+          return valueSelector.$eq;
+        } else if (valueSelector.$in) {
           var matcher = new Minimongo.Matcher({ placeholder: valueSelector });
 
           // Return anything from $in that matches the whole selector for this
@@ -168,7 +170,7 @@ Minimongo.Matcher.prototype.matchingDocument = function () {
             fallback = true;
 
           return middle;
-        } else if (onlyContainsKeys(valueSelector, ['$nin',' $ne'])) {
+        } else if (onlyContainsKeys(valueSelector, ['$nin', '$ne'])) {
           // Since self._isSimple makes sure $nin and $ne are not combined with
           // objects or arrays, we can confidently return an empty object as it
           // never matches any scalar.
@@ -217,4 +219,3 @@ var startsWith = function(str, starts) {
   return str.length >= starts.length &&
     str.substring(0, starts.length) === starts;
 };
-
diff --git a/packages/mongo/collection.js b/packages/mongo/collection.js
index 98d621a7e5..6a588ac64e 100644
--- a/packages/mongo/collection.js
+++ b/packages/mongo/collection.js
@@ -22,6 +22,7 @@ Mongo = {};
 
 The default id generation technique is `'STRING'`.
  * @param {Function} options.transform An optional transformation function. Documents will be passed through this function before being returned from `fetch` or `findOne`, and before being passed to callbacks of `observe`, `map`, `forEach`, `allow`, and `deny`. Transforms are *not* applied for the callbacks of `observeChanges` or to cursors returned from publish functions.
+ * @param {Boolean} options.defineMutationMethods Set to `false` to skip setting up the mutation methods that enable insert/update/remove from client code. Default `true`.
  */
 Mongo.Collection = function (name, options) {
   var self = this;
@@ -209,21 +210,41 @@ Mongo.Collection = function (name, options) {
       getDoc: function(id) {
         return self.findOne(id);
       },
-      
+
       // To be able to get back to the collection from the store.
       _getCollection: function () {
         return self;
       }
     });
 
-    if (!ok)
-      throw new Error("There is already a collection named '" + name + "'");
+    if (!ok) {
+      const message = `There is already a collection named "${name}"`;
+      if (options._suppressSameNameError === true) {
+        // XXX In theory we do not have to throw when `ok` is falsy. The store is already defined
+        // for this collection name, but this will simply be another reference to it and everything
+        // should work. However, we have historically thrown an error here, so for now we will
+        // skip the error only when `_suppressSameNameError` is `true`, allowing people to opt in
+        // and give this some real world testing.
+        console.warn ? console.warn(message) : console.log(message);
+      } else {
+        throw new Error(message);
+      }
+    }
   }
 
   // XXX don't define these until allow or deny is actually used for this
   // collection. Could be hard if the security rules are only defined on the
   // server.
-  self._defineMutationMethods();
+  if (options.defineMutationMethods !== false) {
+    try {
+      self._defineMutationMethods({ useExisting: (options._suppressSameNameError === true) });
+    } catch (error) {
+      // Throw a more understandable error on the server for same collection name
+      if (error.message === `A method named '/${name}/insert' is already defined`)
+        throw new Error(`There is already a collection named "${name}"`);
+      throw error;
+    }
+  }
 
   // autopublish
   if (Package.autopublish && !options._preventAutopublish && self._connection
diff --git a/packages/mongo/collection_tests.js b/packages/mongo/collection_tests.js
index 2e10e449d8..e7b709e861 100644
--- a/packages/mongo/collection_tests.js
+++ b/packages/mongo/collection_tests.js
@@ -9,3 +9,46 @@ Tinytest.add(
     );
   }
 );
+
+Tinytest.add('collection - call new Mongo.Collection multiple times',
+  function (test) {
+    var collectionName = 'multiple_times_1_' + test.id;
+    new Mongo.Collection(collectionName);
+
+    test.throws(
+      function () {
+        new Mongo.Collection(collectionName);
+      },
+      /There is already a collection named/
+    );
+  }
+);
+
+Tinytest.add('collection - call new Mongo.Collection multiple times with _suppressSameNameError=true',
+  function (test) {
+    var collectionName = 'multiple_times_2_' + test.id;
+    new Mongo.Collection(collectionName);
+
+    try {
+      new Mongo.Collection(collectionName, {_suppressSameNameError: true});
+      test.ok();
+    } catch (error) {
+      console.log(error);
+      test.fail('Expected new Mongo.Collection not to throw an error when called twice with the same name');
+    }
+  }
+);
+
+Tinytest.add('collection - call new Mongo.Collection with defineMutationMethods=false',
+  function (test) {
+    var handlerPropName = Meteor.isClient ? '_methodHandlers' : 'method_handlers';
+
+    var methodCollectionName = 'hasmethods' + test.id;
+    var hasmethods = new Mongo.Collection(methodCollectionName);
+    test.equal(typeof hasmethods._connection[handlerPropName]['/' + methodCollectionName + '/insert'], 'function');
+
+    var noMethodCollectionName = 'nomethods' + test.id;
+    var nomethods = new Mongo.Collection(noMethodCollectionName, {defineMutationMethods: false});
+    test.equal(nomethods._connection[handlerPropName]['/' + noMethodCollectionName + '/insert'], undefined);
+  }
+);
diff --git a/packages/reactive-dict/reactive-dict-tests.js b/packages/reactive-dict/reactive-dict-tests.js
index 7c845cd0f4..f67530d011 100644
--- a/packages/reactive-dict/reactive-dict-tests.js
+++ b/packages/reactive-dict/reactive-dict-tests.js
@@ -16,6 +16,18 @@ Tinytest.add('ReactiveDict - setDefault', function (test) {
   dict.setDefault('D', undefined);
   test.equal(dict.all(), {A: 'blah', B: undefined,
                           C: 'default', D: undefined});
+
+  dict = new ReactiveDict;
+  dict.set('A', 'blah');
+  dict.set('B', undefined);
+  dict.setDefault({
+    A: 'default',
+    B: 'defualt',
+    C: 'default',
+    D: undefined
+  });
+  test.equal(dict.all(), {A: 'blah', B: undefined,
+                          C: 'default', D: undefined});
 });
 
 Tinytest.add('ReactiveDict - all() works', function (test) {
diff --git a/packages/reactive-dict/reactive-dict.js b/packages/reactive-dict/reactive-dict.js
index a807898c1b..a4d4592a54 100644
--- a/packages/reactive-dict/reactive-dict.js
+++ b/packages/reactive-dict/reactive-dict.js
@@ -79,8 +79,18 @@ _.extend(ReactiveDict.prototype, {
     }
   },
 
-  setDefault: function (key, value) {
+  setDefault: function (keyOrObject, value) {
     var self = this;
+
+    if ((typeof keyOrObject === 'object') && (value === undefined)) {
+      // Called as `dict.setDefault({...})`
+      self._setDefaultObject(keyOrObject);
+      return;
+    }
+    // the input isn't an object, so it must be a key
+    // and we resume with the rest of the function
+    var key = keyOrObject;
+
     if (! _.has(self.keys, key)) {
       self.set(key, value);
     }
@@ -198,6 +208,14 @@ _.extend(ReactiveDict.prototype, {
     });
   },
 
+  _setDefaultObject: function (object) {
+    var self = this;
+
+    _.each(object, function (value, key){
+      self.setDefault(key, value);
+    });
+  },
+
   _ensureKey: function (key) {
     var self = this;
     if (!(key in self.keyDeps)) {
diff --git a/tools/packaging/warehouse.js b/tools/packaging/warehouse.js
index 585090d0d1..e17f33d4d7 100644
--- a/tools/packaging/warehouse.js
+++ b/tools/packaging/warehouse.js
@@ -43,7 +43,9 @@ var files = require('../fs/files.js');
 var httpHelpers = require('../utils/http-helpers.js');
 var fiberHelpers = require('../utils/fiber-helpers.js');
 
-var WAREHOUSE_URLBASE = 'https://warehouse.meteor.com';
+// Use `METEOR_WAREHOUSE_URLBASE` to override the default warehouse
+// url base. 
+var WAREHOUSE_URLBASE = process.env.METEOR_WAREHOUSE_URLBASE || 'https://warehouse.meteor.com';
 
 var warehouse = exports;
 _.extend(warehouse, {
diff --git a/tools/tool-testing/selftest.js b/tools/tool-testing/selftest.js
index 1f6b1d41ed..bad7286aa1 100644
--- a/tools/tool-testing/selftest.js
+++ b/tools/tool-testing/selftest.js
@@ -13,6 +13,7 @@ var archinfo = require('../utils/archinfo.js');
 var config = require('../meteor-services/config.js');
 var buildmessage = require('../utils/buildmessage.js');
 var execFileSync = require('../utils/processes.js').execFileSync;
+var Builder = require('../isobuild/builder.js').default;
 
 var catalog = require('../packaging/catalog/catalog.js');
 var catalogRemote = require('../packaging/catalog/catalog-remote.js');
@@ -836,9 +837,14 @@ _.extend(Sandbox.prototype, {
 
     var serverUrl = self.env.METEOR_PACKAGE_SERVER_URL;
     var packagesDirectoryName = config.getPackagesDirectoryName(serverUrl);
-    files.cp_r(files.pathJoin(builtPackageTropohouseDir, 'packages'),
-               files.pathJoin(self.warehouse, packagesDirectoryName),
-               { preserveSymlinks: true });
+
+    var builder = new Builder({outputPath: self.warehouse});
+    builder.copyDirectory({
+      from: files.pathJoin(builtPackageTropohouseDir, 'packages'),
+      to: packagesDirectoryName,
+      symlink: true
+    });
+    builder.complete();
 
     var stubCatalog = {
       syncToken: {},