title: Symfony 2.3 Composer Requested Package Not Found
body: <p>I receive the following error every time I try to run composer update:</p>
  
  <blockquote>
    <p>Your requirements could not be resolved to an installable set of packages.</p>
    
    <p>Problem 1
       - The requested package doctrine/data-fixtures dev-master could not be found.</p>
    
    <p>Problem 2
        - The requested package doctrine/doctrine-fixtures-bundle dev-master could not be found.</p>
    
    <p>Potential causes:</p>
    
    <ul>
    <li>A typo in the package name</li>
    <li>The package is not available in a stable-enough version according to your minimum-stability setting
    see <a href="https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion" rel="nofollow">https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion</a> for more details.</li>
    </ul>
  </blockquote>
  
  <p>Here is my composer.json:</p>
  
  <pre><code>{
  "name": "symfony/framework-standard-edition",
  "license": "MIT",
  "type": "project",
  "description": "The \"Symfony Standard Edition\" distribution",
  "autoload": {
      "psr-0": { "": "src/" }
  },
  "require": {
      "php": "&gt;=5.3.3",
      "symfony/symfony": "2.3.*",
      "doctrine/orm": "&gt;=2.2.3,&lt;2.4-dev",
      "doctrine/doctrine-bundle": "1.2.*",
      "twig/extensions": "1.0.*",
      "symfony/assetic-bundle": "2.3.*",
      "symfony/swiftmailer-bundle": "2.3.*",
      "symfony/monolog-bundle": "2.3.*",
      "sensio/distribution-bundle": "2.3.*",
      "sensio/framework-extra-bundle": "2.3.*",
      "sensio/generator-bundle": "2.3.*",
      "incenteev/composer-parameter-handler": "~2.0",
      "friendsofsymfony/user-bundle": "~2.0@dev",
      "doctrine/data-fixtures": "dev-master",
      "doctrine/doctrine-fixtures-bundle": "dev-master"
  },
  "scripts": {
      "post-install-cmd": [
          "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
      ],
      "post-update-cmd": [
          "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
          "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
      ]
  },
  "config": {
      "bin-dir": "bin"
  },
  "minimum-stability": "dev",
  "extra": {
      "symfony-app-dir": "app",
      "symfony-web-dir": "htdocs",
      "symfony-assets-install": "symlink",
      "incenteev-parameters": {
          "file": "app/config/parameters.yml"
      },
      "branch-alias": {
          "dev-master": "2.3-dev"
      }
  }
  }
  </code></pre>
  
  <p>I just want to install data fixtures. Please help!</p>