diff --git a/update_package.sh b/update_package.sh
index dc12dce..7d0eefa 100644
--- a/update_package.sh
+++ b/update_package.sh
@@ -2,6 +2,7 @@
 
 # Get current directory
 this_script_directory=$(cd "$(dirname "$0")" && pwd)
+packenv="";
 
 # Python virtual environment directory: packenv variable in my_config.sh
 source $this_script_directory/my_config.sh;