gistfile1.txt

vagrant@cc-dcmp-dev-infra-00:~/code/dcmp-api/dcmp-api-i1$ composer require behat/behat behat/mink behat/mink-extension laracasts/behat-laravel-extension symfony/config --dev -W
Xdebug: [Step Debug] Could not connect to debugging client. Tried: localhost:9003 (fallback through xdebug.client_host/xdebug.client_port) :-(
Using version ^3.8 for behat/behat
Using version ^1.8 for behat/mink
Using version ^2.3 for behat/mink-extension
Using version ^1.1 for laracasts/behat-laravel-extension
Using version ^5.2 for symfony/config
./composer.json has been updated
Running composer update behat/behat behat/mink behat/mink-extension laracasts/behat-laravel-extension symfony/config --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - behat/mink-extension[2.3.0, ..., 2.3.1] require symfony/config ^2.7|^3.0|^4.0 -> found symfony/config[v2.7.0-BETA1, ..., 2.8.x-dev, v3.0.0-BETA1, ..., 3.4.x-dev, v4.0.0-BETA1, ..., 4.4.x-dev] but it conflicts with your root composer.json require (^5.2).
    - Root composer.json requires behat/mink-extension ^2.3 -> satisfiable by behat/mink-extension[2.3.0, 2.3.1].

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.