Added 'boolean_options' list to support config file parsing.
diff --git a/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index 9b9f606..ec443a3 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -67,6 +67,9 @@
          "[default: dist]"),
         ]
 
+    boolean_options = ['use-defaults', 'prune',
+                       'manifest-only', 'force-manifest',
+                       'keep-tree']
 
     help_options = [
         ('help-formats', None,