Add forgotten import
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 40e0070..1d0a34e 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -10,6 +10,7 @@
 from types import *
 from distutils.core import Command, DEBUG
 from distutils.sysconfig import get_config_vars
+from distutils.errors import DistutilsPlatformError
 from distutils.file_util import write_file
 from distutils.util import convert_path, subst_vars, change_root
 from distutils.errors import DistutilsOptionError