From 7c478d78f1d0aa87dd1ae935c641764da8c836eb Mon Sep 17 00:00:00 2001
From: Brock Mendel <jbrockmendel@gmail.com>
Date: Fri, 3 Nov 2017 13:08:30 -0700
Subject: [PATCH] fix error messages closes #18089

---
 pandas/__init__.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pandas/__init__.py b/pandas/__init__.py
index 8d9b75ccd6c2c..5fc347f4a5aea 100644
--- a/pandas/__init__.py
+++ b/pandas/__init__.py
@@ -28,7 +28,11 @@
                              tslib as _tslib)
 except ImportError as e:  # pragma: no cover
     # hack but overkill to use re
-    module = str(e).replace('cannot import name ', '')
+    module = str(e).replace('cannot import name ', '')\
+                   .replace('No module named ', '')
+    if 'does not export' in module:
+        # GH#18089
+        raise
     raise ImportError("C extension: {0} not built. If you want to import "
                       "pandas from the source directory, you may need to run "
                       "'python setup.py build_ext --inplace --force' to build "