diff --git a/scripts/install b/scripts/install
index 2c0a215..006fd75 100644
--- a/scripts/install
+++ b/scripts/install
@@ -163,7 +163,7 @@ ynh_app_setting_set $app final_path $final_path
 ynh_print_info "Configuring nginx web server..."
 
 ### `ynh_add_nginx_config` will use the file conf/nginx.conf
-if [ $path = "/" ]; then
+if [ $path_url = "/" ]; then
    ynh_replace_string "__SUB_PATH__" "" "..conf/nginx.conf"
 else
   ynh_replace_string "__SUB_PATH__" "$path" "..conf/nginx.conf"
diff --git a/scripts/upgrade b/scripts/upgrade
index c79b405..2882934 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -77,7 +77,8 @@ path_url=$(ynh_normalize_url_path $path_url)
 ynh_print_info "Upgrading nginx web server configuration..."
 
 # Create a dedicated nginx config
-if [ $path = "/" ]; then
+if [ $path_url = "/" ]
+then
    ynh_replace_string "__SUB_PATH__" "" "..conf/nginx.conf"
 else
   ynh_replace_string "__SUB_PATH__" "$path" "..conf/nginx.conf"