PHP Composer "no matching package found" (Mozu PHP API)

I'm trying to get up and running with the Mozu PHP frontend, which relies on Composer for the required libraries. Composer saves failure tests when the following requirements are met:

Composer file:

cat composer.json
{
        "name" : "mozu/api",
        "description" : "SDK for Mozu Rest APIs",
        "type" : "library",
        "homepage" : "https://developer.mozu.com/sdks",
        "keywords" : [
                "Mozu",
                "API",
                "SDK"
        ],
        "license" : "MIT",
        "require" : {
                "guzzle/guzzle" : ">=3.7.3@stable",
                "php" : ">=5.4"
        },
        "require-dev" : {
                "phpunit/phpunit" : ">=3.7.28@stable"
        },
        "autoload" : {
                "psr-0" : {
                        "Mozu" : "src/"
                }
        },
    "extra": {
        "branch-alias": {
            "dev-master": "1.7.x-dev"
        }
    }
}

      

        
        
        
      

    

Installation error:

php composer.phar install
Loading composer repositories with package information
Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package php could not be found in any version, there may be a typo in the package name.
  Problem 2
    - The requested package php could not be found in any version, there may be a typo in the package name.
  Problem 3
    - guzzle/guzzle v3.9.2 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.9.1 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.9.0 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.8.1 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.8.0 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.7.4 requires php >=5.3.3 -> no matching package found.
    - guzzle/guzzle v3.7.3 requires php >=5.3.2 -> no matching package found.
    - Installation request for guzzle/guzzle >=3.7.3@stable -> satisfiable by guzzle/guzzle[v3.7.3, v3.7.4, v3.8.0, v3.8.1, v3.9.0, v3.9.1, v3.9.2].

      

        
        
        
      

    

PHP version:

php -v
PHP 5.3.10-1ubuntu3.13 with Suhosin-Patch (cli) (built: Jul  7 2014 18:52:09)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies

      

        
        
        
      

    

PHP Curl version:

apt-get install php5-curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
php5-curl is already the newest version.

      

        
        
        
      

    

Composer version:

 php composer.phar self-update
You are already using composer version 1e27ff5e22df81e3cd0cd36e5fdd4a3c5a031f4a.