BLD/BUG: revert usage of setuptools when building an sdist.

This was seriously broken.  Setuptools does unwanted 'smart' things and
ignores MANIFEST.in.  Closes gh-7127.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index a7f66a03d..c68f5a399 100755
--- a/setup.py
+++ b/setup.py
@@ -188,7 +188,7 @@ def check_submodules():
             raise ValueError('Submodule not clean: %s' % line)
 
 
-from setuptools.command.sdist import sdist
+from distutils.command.sdist import sdist
 class sdist_checked(sdist):
     """ check submodules on sdist to prevent incomplete tarballs """
     def run(self):