diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1044,6 +1044,7 @@
     'HarbormasterBuildGraph' => 'applications/harbormaster/engine/HarbormasterBuildGraph.php',
     'HarbormasterBuildLintMessage' => 'applications/harbormaster/storage/build/HarbormasterBuildLintMessage.php',
     'HarbormasterBuildLog' => 'applications/harbormaster/storage/build/HarbormasterBuildLog.php',
+    'HarbormasterBuildLogChunk' => 'applications/harbormaster/storage/build/HarbormasterBuildLogChunk.php',
     'HarbormasterBuildLogPHIDType' => 'applications/harbormaster/phid/HarbormasterBuildLogPHIDType.php',
     'HarbormasterBuildLogQuery' => 'applications/harbormaster/query/HarbormasterBuildLogQuery.php',
     'HarbormasterBuildMessage' => 'applications/harbormaster/storage/HarbormasterBuildMessage.php',
@@ -5191,6 +5192,7 @@
       'HarbormasterDAO',
       'PhabricatorPolicyInterface',
     ),
+    'HarbormasterBuildLogChunk' => 'HarbormasterDAO',
     'HarbormasterBuildLogPHIDType' => 'PhabricatorPHIDType',
     'HarbormasterBuildLogQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'HarbormasterBuildMessage' => array(
diff --git a/src/applications/harbormaster/storage/HarbormasterSchemaSpec.php b/src/applications/harbormaster/storage/HarbormasterSchemaSpec.php
--- a/src/applications/harbormaster/storage/HarbormasterSchemaSpec.php
+++ b/src/applications/harbormaster/storage/HarbormasterSchemaSpec.php
@@ -21,31 +21,6 @@
         ),
       ));
 
-
-    $this->buildRawSchema(
-      id(new HarbormasterBuildable())->getApplicationName(),
-      HarbormasterBuildLog::CHUNK_TABLE,
-      array(
-        'id' => 'auto',
-        'logID' => 'id',
-        'encoding' => 'text32',
-
-        // T6203/NULLABILITY
-        // Both the type and nullability of this column are crazily wrong.
-        'size' => 'uint32?',
-
-        'chunk' => 'bytes',
-      ),
-      array(
-        'PRIMARY' => array(
-          'columns' => array('id'),
-          'unique' => true,
-        ),
-        'key_log' => array(
-          'columns' => array('logID'),
-        ),
-      ));
-
   }
 
 }
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php b/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
@@ -15,7 +15,6 @@
   private $isOpen;
 
   const CHUNK_BYTE_LIMIT = 102400;
-  const CHUNK_TABLE = 'harbormaster_buildlogchunk';
 
   /**
    * The log is encoded as plain text.
@@ -128,7 +127,7 @@
     // caller writes a single character over and over again, we'll currently
     // spend a lot of time flushing that.
 
-    $chunk_table = self::CHUNK_TABLE;
+    $chunk_table = id(new HarbormasterBuildLogChunk())->getTableName();
     $chunk_limit = self::CHUNK_BYTE_LIMIT;
     $rope = $this->rope;
 
@@ -198,9 +197,10 @@
     $result = queryfx_all(
       $conn,
       'SELECT chunk '.
-      'FROM harbormaster_buildlogchunk '.
+      'FROM %T '.
       'WHERE logID = %d '.
       'ORDER BY id ASC',
+      id(new HarbormasterBuildLogChunk())->getTableName(),
       $this->getID());
 
     $content = '';
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildLogChunk.php b/src/applications/harbormaster/storage/build/HarbormasterBuildLogChunk.php
new file mode 100644
--- /dev/null
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildLogChunk.php
@@ -0,0 +1,32 @@
+<?php
+
+final class HarbormasterBuildLogChunk
+  extends HarbormasterDAO {
+
+  protected $logID;
+  protected $encoding;
+  protected $size;
+  protected $chunk;
+
+  protected function getConfiguration() {
+    return array(
+      self::CONFIG_TIMESTAMPS => false,
+      self::CONFIG_COLUMN_SCHEMA => array(
+        'logID' => 'id',
+        'encoding' => 'text32',
+
+        // T6203/NULLABILITY
+        // Both the type and nullability of this column are crazily wrong.
+        'size' => 'uint32?',
+
+        'chunk' => 'bytes',
+      ),
+      self::CONFIG_KEY_SCHEMA => array(
+        'key_log' => array(
+          'columns' => array('logID'),
+        ),
+      ),
+    ) + parent::getConfiguration();
+  }
+
+}