From e0d5a021dd58075acaa0ee5796b753f1a6a26cb6 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 1 Feb 2019 13:38:48 +0530
Subject: [PATCH] Fix #1812891 [calibre-3.38.1 tries to download mathjax 
 during build](https://bugs.launchpad.net/calibre/+bug/1812891) again

---
 setup/mathjax.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/setup/mathjax.py b/setup/mathjax.py
index a0ac198d8e..2efbd98b2c 100644
--- a/setup/mathjax.py
+++ b/setup/mathjax.py
@@ -78,6 +78,7 @@ class MathJax(Command):
     def run(self, opts):
         if not opts.system_mathjax and self.already_present():
             self.info('MathJax already present in the resources directory, not downloading')
+            return
         self.use_symlinks = opts.system_mathjax
         self.h = sha1()
         self.mathjax_files = {}