--- a/src/pip/_vendor/certifi/core.py
+++ b/src/pip/_vendor/certifi/core.py
@@ -10,6 +10,4 @@ import os
 
 
 def where():
-    f = os.path.dirname(__file__)
-
-    return os.path.join(f, 'cacert.pem')
+    return '/etc/ssl/ca-bundle.pem'