diff --git a/demo_lxc_build.sh b/demo_lxc_build.sh
index ce5a3f9..ac9ceae 100755
--- a/demo_lxc_build.sh
+++ b/demo_lxc_build.sh
@@ -69,6 +69,8 @@ ynh_lxc_run_inside --name="$lxc_name1" --command="yunohost -v" | tee -a "$LOG_BU
 # ********
 ynh_print_info --message="> Modification de Yunohost pour la demo" | tee -a "$LOG_BUILD_LXC"
 
+if [ ! -z "$PACKAGE_CHECK_EXEC" ]
+then
 # App officielles
 ynh_print_info --message="> Installation des applications officielles" | tee -a "$LOG_BUILD_LXC"
 # Ampache
@@ -142,7 +144,7 @@ ynh_lxc_run_inside --name="$lxc_name1" --command="yunohost app install wordpress
 # Zerobin
 ynh_print_info --message="Installation de zerobin" | tee -a "$LOG_BUILD_LXC"
 ynh_lxc_run_inside --name="$lxc_name1" --command="yunohost app install zerobin --force --args \"domain=$domain&path=/zerobin&is_public=1&\"" | tee -a "$LOG_BUILD_LXC"
-
+fi
 # ********
 
 ynh_print_info --message="> Création d'un snapshot" | tee -a "$LOG_BUILD_LXC"