This works, finally:
{
"name": "bla",
"description": "bla",
"minimum-stability": "dev",
"require": {
"php": ">=5.4",
"symfony/console": ">=2.0.0,<2.2.0-dev",
"symfony/config": ">=2.0.0,<2.2.0-dev",
"symfony/dependency-injection": ">=2.0.0,<2.2.0-dev",
"symfony/event-dispatcher": ">=2.0.0,<2.2.0-dev",
"symfony/translation": ">=2.0.0,<2.2.0-dev",
"symfony/yaml": ">=2.0.0,<2.2.0-dev",
"symfony/finder": ">=2.0.0,<2.2.0-dev",
"zendframework/zendframework": "2.*",
"doctrine/doctrine-module": "dev-master",
"doctrine/doctrine-orm-module": "0.*",
"gedmo/doctrine-extensions": "dev-master"
},
"require-dev": {
"phpunit/phpunit": "3.7.*",
"behat/behat": "2.4.*@stable",
"guzzle/guzzle": "3.0.*"
},
"autoload": {
"psr-0": {
"Behat\\Behat": "src/"
}
}
}