rector/compiler/build/box.json

{
    "alias": "rector.phar",
    "banner": false,
    "base-path": "../..",
    "check-requirements": false,
    "compactors": [
        "KevinGH\\Box\\Compactor\\PhpScoper"
    ],
    "directories": [
        "config",
        "src",
        "rules",
        "packages",
        "vendor"
    ],
    "output": "tmp/rector.phar",
    "php-scoper": "compiler/build/scoper.inc.php"
}