diff --git a/scripts/upgrade b/scripts/upgrade
index 5d80811..efe9cac 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -117,9 +117,7 @@ ynh_system_user_create --username=$mautrix_bridge_user
 
 if [ "$upgrade_type" == "UPGRADE_APP" ]; then
   ynh_script_progression --message="Upgrading python packages..." --weight=1
-  if [ -z $HOME ]; then
-    HOME=$final_path # HACK see https://github.com/mautrix/telegram/issues/661
-  fi
+  export HOME=$final_path # HACK see https://github.com/mautrix/telegram/issues/661
   $final_path/bin/pip3 install --upgrade setuptools wheel # HACK fixes "error: invalid command 'bdist_wheel'"
   $final_path/bin/pip3 install --upgrade $final_path/src/mautrix-telegram.tar.gz[postgres,speedups,qr_login] #,hq_thumbnails
 fi