How can I include Guzzle as a library in a distribution?
I disabled composer system wide on my machine and create a make file and it works fine installing Drupal 7 core plus the following modules: composer, composer_autoload &amp; guzzle.

This is the content of platform.make 

$Id$

; API

api = 2

; Core

core = 7.x

; Drupal project.

projects[drupal][type] = core  
projects[drupal][version] = 7.x  
projects[drupal][download][type] = git  
projects[drupal][download][branch] = 7.x  

; Modules

projects[composer] = 1.x-dev  
projects[] = composer_autoload  
projects[] = guzzle