Add cli commands to build ebooks

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/output/ebook.js b/lib/output/ebook.js
index a0e72a9..794f521 100644
--- a/lib/output/ebook.js
+++ b/lib/output/ebook.js
@@ -4,13 +4,14 @@ var juice = require('juice');
 
 var command = require('../utils/command');
 var fs = require('../utils/fs');
+var Promise = require('../utils/promise');
 var WebsiteOutput = require('./website');
 var assetsInliner = require('./assets-inliner');
 
 function _EbookOutput() {
     WebsiteOutput.apply(this, arguments);
 }
-util.inherits(EbookOutput, WebsiteOutput);
+util.inherits(_EbookOutput, WebsiteOutput);
 
 var EbookOutput = assetsInliner(_EbookOutput);