diff --git a/fvp-docker-images/builders.sh b/fvp-docker-images/builders.sh
index 0645356..c22c01c 100644
--- a/fvp-docker-images/builders.sh
+++ b/fvp-docker-images/builders.sh
@@ -1,11 +1,13 @@
 #!/bin/bash
 
+set -ex
+
 if ! type aws
 then
     sudo apt-get -y -qq update
     sudo apt-get -y -qq install --no-install-recommends unzip
     curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
-    unzip awscliv2.zip
+    unzip -q awscliv2.zip
     sudo ./aws/install
 fi