diff --git a/lib/core/engine.js b/lib/core/engine.js
index 40a2f7be7..7609a3a7d 100644
--- a/lib/core/engine.js
+++ b/lib/core/engine.js
@@ -182,6 +182,9 @@ class Engine {
           if (self.watch) {
             self.watch.restart(); // Necessary because changing a file while it is writing can stop it from being watched
           }
+          if (msg.error) {
+            return self.logger.error(msg.error);
+          }
           return self.events.emit('outputDone');
         }
 
diff --git a/lib/pipeline/pipeline.js b/lib/pipeline/pipeline.js
index 9b7d064d2..d69e21b39 100644
--- a/lib/pipeline/pipeline.js
+++ b/lib/pipeline/pipeline.js
@@ -285,7 +285,6 @@ class Pipeline {
 
     webpack(webpackOptions).run((_err, _stats) => {
       if (_err) {
-        console.log('ERROS');
         console.log(_err);
       }
       if (!detectErrors) {
@@ -364,10 +363,8 @@ class Pipeline {
       }
     ], cb);
   }
-
 }
 
-
 process.on('message', (msg) => {
   if (msg.action === constants.pipeline.init) {
     pipeline = new Pipeline(msg.options);
@@ -375,13 +372,12 @@ process.on('message', (msg) => {
   }
 
   if (msg.action === constants.pipeline.build) {
-    return pipeline.build(msg.abi, msg.contractsJSON, msg.path, (err, result) => {
-      process.send({result: constants.pipeline.built, error: err, data: result});
+    return pipeline.build(msg.abi, msg.contractsJSON, msg.path, (err) => {
+      process.send({result: constants.pipeline.built, error: err});
     });
   }
 });
 
-
 process.on('exit', () => {
   process.exit(0);
 });