Does anyone know how to override this file?

1 Answer 1


If the default magento preferences dont work, I think you can use composer's autoload functionality for that, add something like this to your composer.json:

"autoload": {
"psr-4": {
    "App\\": "app/"
"psr-0": {
    "\Monolog\Handler\StreamHandler": "vendor-custom/handler/streamhandler",


I didnt test this so it could be wrong. More info about this can be found here: https://stackoverflow.com/questions/57600844/composer-override-a-package-file

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