diff --git a/src/DrupalCI/Plugin/BuildSteps/generic/Composer.php b/src/DrupalCI/Plugin/BuildSteps/generic/Composer.php
index 36e1a56..f959dcb 100644
--- a/src/DrupalCI/Plugin/BuildSteps/generic/Composer.php
+++ b/src/DrupalCI/Plugin/BuildSteps/generic/Composer.php
@@ -18,13 +18,12 @@ class Composer extends ContainerCommand {
    * {@inheritdoc}
    */
   public function run($input, $data) {
-    // @TODO http://stackoverflow.com/a/25208897/308851
     $cmd = $this->buildComposerCommand($input);
     parent::run($cmd);
   }
 
   protected function buildComposerCommand($input) {
-    // TODO: Code to interpret the input and output an actual valid composer command
+    return 'composer.phar --working-dir core --prefer-dist install';
   }
 
 }
diff --git a/src/DrupalCI/Plugin/Preprocess/variable/DrupalInstall.php b/src/DrupalCI/Plugin/Preprocess/variable/DrupalInstall.php
new file mode 100644
index 0000000..5e5305d
--- /dev/null
+++ b/src/DrupalCI/Plugin/Preprocess/variable/DrupalInstall.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * @file
+ * Contains \DrupalCI\Plugin\Preprocess\variable\RunOptions
+ */
+
+namespace DrupalCI\Plugin\Preprocess\variable;
+
+use DrupalCI\Plugin\PluginBase;
+
+/**
+ * @PluginID("drupalinstall")
+ */
+class DrupalInstall extends PluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function target() {
+    return 'DCI_DrupalInstall';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function process($target_variable_original, $source_value) {
+
+  }
+
+}