diff -Naur a/setup.py b/setup.py
--- a/setup.py	2017-12-22 10:52:43.730264611 -0500
+++ b/setup.py	2017-12-22 10:53:27.660104199 -0500
@@ -15,30 +15,6 @@
 from distutils.command.install import install
 import os,sys,shutil
 
-class GurobiClean(Command):
-    description = "remove the build directory"
-    user_options = []
-    def initialize_options(self):
-        self.cwd = None
-    def finalize_options(self):
-        self.cwd = os.path.dirname(os.path.realpath(__file__))
-    def run(self):
-        assert os.getcwd() == self.cwd, 'Must be run from setup.py directory: %s' % self.cwd
-        build_dir = os.path.join(os.getcwd(), "build")
-        if os.path.exists(build_dir):
-            print('removing %s' % build_dir)
-            shutil.rmtree(build_dir)
-
-class GurobiInstall(install):
-
-    # Calls the default run command, then deletes the build area
-    # (equivalent to "setup clean --all").
-    def run(self):
-        install.run(self)
-        c = GurobiClean(self.distribution)
-        c.finalize_options()
-        c.run()
-
 License = """
     This software is covered by the Gurobi End User License Agreement.
     By completing the Gurobi installation process and using the software,
@@ -79,20 +55,4 @@
       packages = ['gurobipy'],
       package_dir={'gurobipy' : srcpath },
       package_data = {'gurobipy' : [srcfile] },
-      cmdclass={'install' : GurobiInstall, 
-                'clean'   : GurobiClean }
       )
-
-if os.name == 'posix' and sys.platform == 'darwin': # update Mac paths
-  verstr = sys.version[:3]
-  default = '/Library/Frameworks/Python.framework/Versions/%s/Python' % verstr
-  default = '/System'+default if verstr == '2.7' else default
-  modified = sys.prefix + '/Python'
-  if default != modified:
-    import subprocess
-    from distutils.sysconfig import get_python_lib
-    sitelib = get_python_lib() + '/gurobipy/gurobipy.so'
-    if not os.path.isfile(modified): # Anaconda
-      libver = verstr if verstr == '2.7' else verstr+'m'
-      modified = sys.prefix + '/lib/libpython%s.dylib' % libver # For Anaconda
-    subprocess.call(('install_name_tool', '-change', default, modified, sitelib))