Added 'description' class attribute to every command class (to help the
  '--help-commands' option).
Shuffled imports around in a few command modules to avoid expensive
  up-front import of sysconfig (and resulting delays in generating list
  of all commands).
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 6f5d671..0e5b01c 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -8,13 +8,14 @@
 
 import sys, os, string
 from types import *
-from distutils import sysconfig
 from distutils.core import Command
 from distutils.util import write_file
 
 
 class Install (Command):
 
+    description = "install everything from build directory"
+
     options = [('prefix=', None, "installation prefix"),
                ('exec-prefix=', None,
                 "prefix for platform-specific files"),
@@ -246,6 +247,8 @@
            then replace it with the current installation prefix and
            return the "relocated" installation directory."""
 
+        from distutils import sysconfig
+
         if use_exec:
             sys_prefix = os.path.normpath (sys.exec_prefix)
             my_prefix = self.exec_prefix