Final patch for issue 9807.
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 58f6ec5..7f9d00f 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -48,7 +48,7 @@
     '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$py_version_short$abiflags/$dist_name',
         'scripts': '$base/bin',
         'data'   : '$base',
         },
@@ -82,7 +82,8 @@
     INSTALL_SCHEMES['unix_user'] = {
         'purelib': '$usersite',
         'platlib': '$usersite',
-        'headers': '$userbase/include/python$py_version_short/$dist_name',
+        'headers':
+            '$userbase/include/python$py_version_short$abiflags/$dist_name',
         'scripts': '$userbase/bin',
         'data'   : '$userbase',
         }
@@ -322,6 +323,7 @@
                             'prefix': prefix,
                             'sys_exec_prefix': exec_prefix,
                             'exec_prefix': exec_prefix,
+                            'abiflags': sys.abiflags,
                            }
 
         if HAS_USER_SITE: