diff --git a/tasks/build.js b/tasks/build.js
index f10cb4749..e4b971493 100644
--- a/tasks/build.js
+++ b/tasks/build.js
@@ -60,7 +60,12 @@ module.exports = function (grunt) {
         spawn([
             "xcodebuild -project appshell.xcodeproj -config Release clean",
             "xcodebuild -project appshell.xcodeproj -config Release build"
-        ]).then(function () {
+        ]).then(function (result) {
+            if (result.stderr.match('xcrun: Error')) {
+              grunt.log.error('Unable to run : ' + result.cmd + ' ' + result.args.join(' '));
+              grunt.log.error(result.stderr);
+              return done(false);
+            }
             done();
         }, function (err) {
             grunt.log.error(err);
diff --git a/tasks/common.js b/tasks/common.js
index 4481ad933..226dcbce6 100644
--- a/tasks/common.js
+++ b/tasks/common.js
@@ -185,6 +185,8 @@ module.exports = function (grunt) {
                 }
                 child.on("close", function (code) {
                     var closeResult = {
+                        cmd: cmd,
+                        args: args,
                         code: code,
                         stdout: stdout.toString(),
                         stderr: stderr.toString(),