diff -r e9947323a7d7 Lib/distutils/command/build_ext.py
--- a/Lib/distutils/command/build_ext.py	Tue Aug 23 22:53:32 2016 +0900
+++ b/Lib/distutils/command/build_ext.py	Wed Sep 14 18:07:12 2016 +0900
@@ -219,9 +219,7 @@
         if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos':
             if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
                 # building third party extensions
-                self.library_dirs.append(os.path.join(sys.prefix, "lib",
-                                                      "python" + get_python_version(),
-                                                      "config"))
+                self.library_dirs.append(sysconfig.get_config_var('LIBPL'))
             else:
                 # building python standard extensions
                 self.library_dirs.append('.')