diff --git a/install/alternc.install b/install/alternc.install
index 8f2d84ba..84f3ad0f 100644
--- a/install/alternc.install
+++ b/install/alternc.install
@@ -22,6 +22,8 @@
 # Purpose of file: Main install script, launch it anytime ;) 
 # ----------------------------------------------------------------------
 
+set -e
+
 # Somes check before start operations
 if [ `id -u` -ne 0 ]; then
     echo "must be launched as root"