Index: src/config/option/ArcanistWildConfigOption.php
===================================================================
--- src/config/option/ArcanistWildConfigOption.php
+++ src/config/option/ArcanistWildConfigOption.php
@@ -32,4 +32,8 @@
     return $value;
   }
 
+  public function getStorageValueFromValue($value) {
+    return $value;
+  }
+
 }
Index: src/config/source/ArcanistFileConfigurationSource.php
===================================================================
--- src/config/source/ArcanistFileConfigurationSource.php
+++ src/config/source/ArcanistFileConfigurationSource.php
@@ -1,11 +1,10 @@
 <?php
 
 final class ArcanistFileConfigurationSource
-  extends ArcanistConfigurationSource {
+  extends ArcanistFilesystemConfigurationSource {
 
   public function getFileKindDisplayName() {
     return pht('Config File');
   }
 
-
 }
\ No newline at end of file