Can't launch detect without parameter

[jjanvier]

Default dir should be .

jjanvier:lambdas$ vendor/bin/php-coupling-detector detect                                                                             

PHP Fatal error:  Uncaught TypeError: is_file() expects parameter 1 to be a valid path, null given in /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/akeneo/php-coupling-detector/src/Console/Command/DetectCommand.php:92
Stack trace:
#0 /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/akeneo/php-coupling-detector/src/Console/Command/DetectCommand.php(92): is_file(NULL)
#1 /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/symfony/console/Command/Command.php(255): Akeneo\CouplingDetector\Console\Command\DetectCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/symfony/console/Application.php(912): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#3 /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/symfony/console/Application.php(264): Symfony\Component in /home/jjanvier/workspaces/phpstorm/perso/c2p/lambdas/vendor/akeneo/php-coupling-detector/src/Console/Command/DetectCommand.php on line 92