I already have a preexisting project and I need to install laravel on it, however:
$ php ../composer.phar create-project laravel/laravel
Installing laravel/laravel (v4.2.11)
[InvalidArgumentException]
Project directory /opt/lampp/htdocs/balaozinho/src/laravel/ is not empty.
create-project [-s|--stability="..."] [--prefer-source] [--prefer-dist] [--repository-url="..."] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-scripts] [--no-progress] [--keep-vcs] [--no-install] [--ignore-platform-reqs] [package] [directory] [version]
How can I resolve?