diff --git a/lib/slugbuilder/builder.rb b/lib/slugbuilder/builder.rb
index b4acded..eb3c025 100644
--- a/lib/slugbuilder/builder.rb
+++ b/lib/slugbuilder/builder.rb
@@ -51,7 +51,7 @@ def build(clear_cache: false, env: {}, prebuild: nil, postbuild: nil, slug_name:
       end
       return true
     rescue => e
-      stitle("Failed: #{e}")
+      stitle("Failed: #{e}\n#{e.backtrace.join("\n")}")
       return false
     end