diff --git a/src/doc/rustc-dev-guide/ci/build-ignore-timeouts.sh b/src/doc/rustc-dev-guide/ci/build-ignore-timeouts.sh
index b21ce24e83f9..e777f349a3c0 100644
--- a/src/doc/rustc-dev-guide/ci/build-ignore-timeouts.sh
+++ b/src/doc/rustc-dev-guide/ci/build-ignore-timeouts.sh
@@ -1,3 +1,4 @@
+#!/bin/bash -x
 
 output=$(mktemp)