diff --git a/MANIFEST.in b/MANIFEST.in
index 0497df0..a66e7fa 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -15,8 +15,6 @@ exclude tools
 exclude CONTRIBUTING.md
 exclude .editorconfig
 
-graft setupext
-
 graft scripts
 
 # Load main dir but exclude things we don't want in the distro
diff --git a/setupbase.py b/setupbase.py
index 1100985..ecea9e7 100644
--- a/setupbase.py
+++ b/setupbase.py
@@ -24,7 +24,6 @@ from setuptools.command.build_py import build_py
 from setuptools.command.install import install
 from setuptools.command.install_scripts import install_scripts
 
-from setupext import install_data_ext
 
 #-------------------------------------------------------------------------------
 # Useful globals and utility functions
@@ -65,7 +64,6 @@ setup_args = dict(
       author           = author,
       author_email     = author_email,
       license          = license,
-      cmdclass         = {'install_data': install_data_ext},
       )
 
 
diff --git a/setupext/__init__.py b/setupext/__init__.py
deleted file mode 100644
index 3933cb5..0000000
--- a/setupext/__init__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-# load extended setup modules for distutils
-
-from .install_data_ext import install_data_ext
diff --git a/setupext/install_data_ext.py b/setupext/install_data_ext.py
deleted file mode 100644
index ce6623b..0000000
--- a/setupext/install_data_ext.py
+++ /dev/null
@@ -1,80 +0,0 @@
-# install_data_ext.py
-#
-# Subclass of normal distutils install_data command to allow more
-# configurable installation of data files.
-
-import os
-from distutils.command.install_data import install_data
-from distutils.util import change_root, convert_path
-
-class install_data_ext(install_data):
-
-    def initialize_options(self):
-        self.install_base = None
-        self.install_platbase = None
-        self.install_purelib = None
-        self.install_headers = None
-        self.install_lib = None
-        self.install_scripts = None
-        self.install_data = None
-
-        self.outfiles = []
-        self.root = None
-        self.force = 0
-        self.data_files = self.distribution.data_files
-        self.warn_dir = 1
-        
-
-    def finalize_options(self):
-        self.set_undefined_options('install',
-                                   ('root', 'root'),
-                                   ('force', 'force'),
-                                   ('install_base', 'install_base'),
-                                   ('install_platbase',
-                                    'install_platbase'),
-                                   ('install_purelib',
-                                    'install_purelib'),
-                                   ('install_headers',
-                                    'install_headers'),
-                                   ('install_lib', 'install_lib'),
-                                   ('install_scripts',
-                                    'install_scripts'),
-                                   ('install_data', 'install_data'))
-                                   
-
-    def run(self):
-        """
-        This is where the meat is.  Basically the data_files list must
-        now be a list of tuples of 3 entries.  The first
-        entry is one of 'base', 'platbase', etc, which indicates which
-        base to install from.  The second entry is the path to install
-        too.  The third entry is a list of files to install.
-        """
-        for lof in self.data_files:
-            if lof[0]:
-                base = getattr(self, 'install_' + lof[0])
-            else:
-                base = getattr(self, 'install_base')
-            dir = convert_path(lof[1])
-            if not os.path.isabs(dir):
-                dir = os.path.join(base, dir)
-            elif self.root:
-                dir = change_root(self.root, dir)
-            self.mkpath(dir)
-
-            files = lof[2]
-            if len(files) == 0:
-                # If there are no files listed, the user must be
-                # trying to create an empty directory, so add the
-                # directory to the list of output files.
-                self.outfiles.append(dir)
-            else:
-                # Copy files, adding them to the list of output files.
-                for f in files:
-                    f = convert_path(f)
-                    (out, _) = self.copy_file(f, dir)
-                    #print "DEBUG: ", out  # dbg
-                    self.outfiles.append(out)
-                    
-
-        return self.outfiles