Add on your deps

[ZendFramework]
    git=http://github.com/andres-montanez/Zend-Framework.git
    version=v1.11.11
    target=/zend-framework

And then

  bin/vendors install

And last, register the prefix on autoload.php

$loader->registerPrefixes(array(
    ...
    'Zend_' => __DIR__.'/../vendor/zend-framework',
));