title: Composer phar package not found
body: <p>I am trying to create a new composer library package. 
  I created the composer.json file using the </p>
  
  <p><code>composer.phar create-project xlix vendor/xlix/xlix 0.3</code> </p>
  
  <p>command.</p>
  
  <p>In the filesystem the file composer.json exists under <code>vendor/xlix/xlix</code> and for testing purposes I copied it to <code>vendor/xlix</code>. </p>
  
  <p>The composer.json file content is the following:</p>
  
  <pre><code>{
      "name": "xlix/xlix",
      "type": "library",
      "description": "XLIX package",
      "keywords": ["core"],
      "homepage": "http://myhomepage",
      "license": "GPL",
      "authors": [
          {
              "name": "Florian Kasper",
              "email": "florian.kasper@mymail"
          }
      ],
      "require": {
          "php": "&gt;=5.2.4"
      },
      "autoload": {
          "psr-0" : {
              "Xlix\\Bundle" : "lib/"
          }
      },
      "extra": {
          "branch-alias": {
              "dev-master": "1.0"
          }
      }
  }
  </code></pre>
  
  <p>Then I tried the following commands:</p>
  
  <pre><code>git:(master) ✗  php composer.phar require xlix/xlix
  git:(master) ✗  php composer.phat require vendor/xlix
  ...
  
  git:(master) ✗  php composer.phar install vendor/xlix
  git:(master) ✗  php composer.phar install xlix/xlix
  ...
  </code></pre>
  
  <p>Every time the same output:</p>
  
  <pre><code>Please provide a version constraint for the xlix/xlix requirement: *
  composer.json has been updated
  Loading composer repositories with package information
  Updating dependencies
  Your requirements could not be resolved to an installable set of packages.
  
    Problem 1
      - The requested package xlix/xlix could not be found in any version, there may be a typo in the package name.
  
  Potential causes:
   - A typo in the package name
   - The package is not available in a stable-enough version according to your minimum-stability setting
     see &lt;https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion&gt; for more details.
  </code></pre>
  
  <p>In my <strong>ROOTDIR/composer.json</strong> file the package is registered in the require section.</p>
  
  <pre><code>"jms/security-extra-bundle": "1.2.*",
  "jms/di-extra-bundle": "1.1.*",
  "kriswallsmith/assetic": "1.1.*@dev",
  "xlix/xlix": "&gt;=0.*"
  </code></pre>
  
  <p>Now I am on the edge of despair an don't know what to do anymore.</p>
  
  <p>Question:</p>
  
  <p>Are there any mistakes I've made or is there anything i missed?</p>