--- setup.py
+++ setup.py
@@ -500,14 +500,6 @@
             os.unlink(tmpfile)
 
     def detect_modules(self):
-        # Ensure that /usr/local is always used
-        if not cross_compiling:
-            add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
-            add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
-        if cross_compiling:
-            self.add_gcc_paths()
-        self.add_multiarch_paths()
-
         # Add paths specified in the environment variables LDFLAGS and
         # CPPFLAGS for header and library files.
         # We must get the values from the Makefile and not the environment
@@ -542,17 +534,6 @@
                     for directory in reversed(options.dirs):
                         add_dir_to_list(dir_list, directory)
 
-        if os.path.normpath(sys.prefix) != '/usr' \
-                and not sysconfig.get_config_var('PYTHONFRAMEWORK'):
-            # OSX note: Don't add LIBDIR and INCLUDEDIR to building a framework
-            # (PYTHONFRAMEWORK is set) to avoid # linking problems when
-            # building a framework with different architectures than
-            # the one that is currently installed (issue #7473)
-            add_dir_to_list(self.compiler.library_dirs,
-                            sysconfig.get_config_var("LIBDIR"))
-            add_dir_to_list(self.compiler.include_dirs,
-                            sysconfig.get_config_var("INCLUDEDIR"))
-
         try:
             have_unicode = unicode
         except NameError: