diff --git a/ivas_be_conf_test_gen.sh b/ivas_be_conf_test_gen.sh
index 2536de1f89e99874beb08d41ffc844aeee53ddcb..db23621c4a7060e471fde05dc10531b34ea443d1 100644
--- a/ivas_be_conf_test_gen.sh
+++ b/ivas_be_conf_test_gen.sh
@@ -1,5 +1,9 @@
+#! /bin/sh
+
+set -e
+
 make -f Makefile clean
-make -f Makefile -j CLANG=0
+make -f Makefile -j"$(nproc)" CLANG=0
 cp IVAS_cod IVAS_cod_ref
 cp IVAS_dec IVAS_dec_ref
 cp IVAS_rend IVAS_rend_ref