diff --git a/lib/http_server.js b/lib/http_server.js
index f1b764f..924f9bf 100644
--- a/lib/http_server.js
+++ b/lib/http_server.js
@@ -84,6 +84,10 @@ var ZettaHttpServer = module.exports = function(zettaInstance, options) {
           name = decodeURI(name);
           self.zetta.log.emit('log', 'http_server', 'Websocket connection for peer "' + name + '" established.');
 
+          // Include ._env and ._loader on websocket, allows argo formatters to work used in virtual_device build actions.
+          var host = ws.upgradeReq.headers['host']
+          self.wireUpWebSocketForEvent(ws, host, '/servers/' + name);
+          
           if (self.peers[name] && self.peers[name].state !== PeerSocket.DISCONNECTED) {
             // peer already connected or connecting
             ws.close(4000, 'peer already connected');
diff --git a/lib/virtual_device.js b/lib/virtual_device.js
index f1c81a0..dbcd57f 100644
--- a/lib/virtual_device.js
+++ b/lib/virtual_device.js
@@ -3,6 +3,7 @@ var util = require('util');
 var ReadableStream = require('stream').Readable;
 var EventEmitter = require('events').EventEmitter;
 var rels = require('zetta-rels');
+var buildDeviceActions = require('./api_formats/siren/device.siren').buildActions;
 
 var VirtualStream = module.exports = function(topic, socket, options) {
   ReadableStream.call(this, options);
@@ -41,6 +42,10 @@ var VirtualDevice = module.exports = function(entity, peerSocket) {
   });
 
   this._socket.on(logTopic, function(data) {
+    // Format data.actions to siren action format
+    data.actions = buildDeviceActions(data.properties.id, self._socket.ws._env, self._socket.ws._loader, data.transitions);
+    delete data.transitions;
+
     self._update(data);
     self._eventEmitter.emit(data.transition);
   });