diff --git a/backup.nix b/backup.nix
index 001dcd3..90cf87b 100644
--- a/backup.nix
+++ b/backup.nix
@@ -44,6 +44,8 @@ in {
     ];
 
     script = ''
+      set -o pipefail
+
       ageRecipient="age17ckyc69njpryytc63ynn545jswyucg28k5xg3043g3j6q38dxqwq0wzhm2"
       bucket="$(grep 'bucket=' < "${backupConfigFile}" | sed 's/bucket \?= \?//g')"
       prefix="$(grep 'prefix=' < "${backupConfigFile}" | sed 's/prefix \?= \?//g')"