Fixed install directory for header files on Unix.
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 7176fab..21d971b 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -18,7 +18,7 @@
     'unix_prefix': {
         'purelib': '$base/lib/python$py_version_short/site-packages',
         'platlib': '$platbase/lib/python$py_version_short/site-packages',
-        'headers': '$base/include/python/$py_version_short/$dist_name',
+        'headers': '$base/include/python$py_version_short/$dist_name',
         'scripts': '$base/bin',
         'data'   : '$base/share',
         },