diff --git a/.travis.yml b/.travis.yml
index 3bef041..27153a1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
 language: objective-c
 osx_image: xcode9
 script:
- - ./build-install.rb
+ - ./build-install.rb --debug