diff --git a/_webi/example_install_safe_copy.sh b/_webi/example_install_safe_copy.sh
index 8105a6c..8fdcd0b 100644
--- a/_webi/example_install_safe_copy.sh
+++ b/_webi/example_install_safe_copy.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+set -e
+set -u
+
 # For installing from the extracted package tmp directory
 pkg_install() {
     (