Looks like that solved it;

```
$ docker-compose exec www php -v
PHP 7.4.13 (cli) (built: Dec  1 2020 04:18:12) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.13, Copyright (c), by Zend Technologies
    with Xdebug v2.9.8, Copyright (c) 2002-2020, by Derick Rethans
```