diff --git a/lib/deploy-methods/s3.js b/lib/deploy-methods/s3.js
index 3e5743f..c5638d9 100644
--- a/lib/deploy-methods/s3.js
+++ b/lib/deploy-methods/s3.js
@@ -105,6 +105,12 @@ function _doReleaseBySync(build, target, data) {
                     childProcess.exec(`aws s3 sync ${path} s3://${target}`, {env}, (err, stdout, stderr) => {
                         if (err) {
                             cleanupCb();
+
+                            if (err.toString().indexOf('aws: command not found')) {
+                                console.log('It looks like you don\'t have the `aws` command on your system that is required to deploy this build.'.red);
+                                console.log('See https://aws.amazon.com/cli/ for instructions how to inststall the AWS CLI.'.red);
+                            }
+
                             return reject('Sync failed: ' + err);
                         }