Error during composer install

[mgeoffray]

I have an issue when I try to create a box for Magento 1

Steps to reproduce

• magestead new magento1
• IP : 192.168.13.13
• 1 CPU
• memory_limit : 2048
• Ubuntu 14
• NGINX
• Magento
• box.magento1.dev
• EUR
• fr_FR

Everything go fine until the end of the composer install => Generating autoload files

Generating autoload files

  [RuntimeException]                                                                                                                                                          
  Could not scan for classes inside "/path/to/installation/magento1/vendor/phpunit/phpunit-selenium/PHPUnit/" which does not appear to be a file nor a folder  

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]...

This error leads to

Installing Magento Software
Could not open input file: install.php