diff -r b339a35e2e77 Lib/sysconfig.py
--- a/Lib/sysconfig.py	Sun Jul 26 07:59:45 2015 -0700
+++ b/Lib/sysconfig.py	Wed Aug 19 16:33:45 2015 -0700
@@ -83,11 +83,13 @@
 _SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include',
                 'scripts', 'data')
 
- # FIXME don't rely on sys.version here, its format is an implementation detail
- # of CPython, use sys.version_info or sys.hexversion
-_PY_VERSION = sys.version.split()[0]
-_PY_VERSION_SHORT = sys.version[:3]
-_PY_VERSION_SHORT_NO_DOT = _PY_VERSION[0] + _PY_VERSION[2]
+_PY_VERSION = '{}.{}.{}'.format(*sys.version_info[:3])
+if sys.version_info.releaselevel != 'final':
+    releaselevel_abbr = {'alpha': 'a', 'beta': 'b', 'candidate': 'rc'}.get(
+                         sys.version_info.releaselevel, '?')
+    _PY_VERSION += '{}{}'.format(releaselevel_abbr, sys.version_info.serial)
+_PY_VERSION_SHORT = '{}.{}'.format(*sys.version_info[:2])
+_PY_VERSION_SHORT_NO_DOT = '{}{}'.format(*sys.version_info[:2])
 _PREFIX = os.path.normpath(sys.prefix)
 _BASE_PREFIX = os.path.normpath(sys.base_prefix)
 _EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
@@ -513,7 +515,7 @@
         _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
         _CONFIG_VARS['py_version'] = _PY_VERSION
         _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
-        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]
+        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT
         _CONFIG_VARS['installed_base'] = _BASE_PREFIX
         _CONFIG_VARS['base'] = _PREFIX
         _CONFIG_VARS['installed_platbase'] = _BASE_EXEC_PREFIX