--- Lib/distutils/command/build_ext.py	2009-03-02 18:54:19.000000000 +0000
+++ Lib/distutils/command/build_ext.py.new	2009-03-02 18:53:54.000000000 +0000
@@ -201,7 +201,11 @@
                 and sysconfig.get_config_var('Py_ENABLE_SHARED'):
             if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
                 # building third party extensions
-                self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))
+                sysroot = os.getenv('SYSROOT')
+                if sysroot is None:
+                    sysroot = ''
+
+                self.library_dirs.append(sysroot+sysconfig.get_config_var('LIBDIR'))
             else:
                 # building python standard extensions
                 self.library_dirs.append('.')