From 57504ba6ec1d42972c3732013bb573e4c93b3315 Mon Sep 17 00:00:00 2001
From: David Wilson <dw@botanicus.net>
Date: Wed, 7 Nov 2018 01:58:30 +0000
Subject: [PATCH] issue #109: core: meta_path regression in newer Pythons

Python at some point (at least since https://bugs.python.org/issue14605)
began populating sys.meta_path with its internal importer classes,
meaning that interpreters no longer start with an empty sys.meta_path.
---
 mitogen/core.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mitogen/core.py b/mitogen/core.py
index cb64fc92..7f00da05 100644
--- a/mitogen/core.py
+++ b/mitogen/core.py
@@ -2791,7 +2791,7 @@ class ExternalContext(object):
 
         self.importer = importer
         self.router.importer = importer
-        sys.meta_path.append(self.importer)
+        sys.meta_path.insert(0, self.importer)
 
     def _setup_package(self):
         global mitogen