magento2: Installation fails

I run git clone and composer install, when I run ./bin/magento I get this error:

Fatal error: Cannot instantiate interface Magento\Framework\Config\CacheInterface in/www/projects/magento2/lib/internal/Magento/Framework/ObjectManager/Factory/Dynamic/Developer.php on line 73

Tested with branch merchant_beta and develop. Any pointers?

$ php -v
PHP 5.6.10 (cli) (built: Jul 12 2015 16:05:00) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
    with Zend Extension Manager v8.5.0, Copyright (c) 2003-2015, by Zend Technologies
    - with Zend Data Cache v8.5.0, Copyright (c) 2004-2015, by Zend Technologies [loaded] [licensed] [disabled]
    - with Zend Job Queue v8.5.0, Copyright (c) 2004-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend Utils v8.5.0, Copyright (c) 2004-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend Code Tracing v8.5.0, Copyright (c) 2009-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend Server Z-Ray v8.5.0, Copyright (c) 1999-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend Monitor v8.5.0, Copyright (c) 1999-2015, by Zend Technologies [loaded] [licensed] [disabled]
    - with Zend Debugger v6.0.0-i5, Copyright (c) 1999-2015, by Zend Technologies [loaded] [licensed] [enabled]
    - with Zend Page Cache v8.5.0, Copyright (c) 2004-2015, by Zend Technologies [loaded] [licensed] [disabled]
    - with Zend Monitor UI v8.5.0, Copyright (c) 2004-2015, by Zend Technologies [loaded] [licensed] [enabled]