diff -r 1d71ce4531ac configure.ac
--- a/configure.ac	Sat Sep 10 16:19:45 2016 +0200
+++ b/configure.ac	Sat Sep 10 19:46:42 2016 +0200
@@ -78,7 +78,7 @@
 	    AC_MSG_ERROR([python$PACKAGE_VERSION interpreter not found])
 	fi
         AC_MSG_RESULT($interp)
-	PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib '$interp
+	PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib _SYSCONFIGDATA_NAME=_sysconfigdata_$(ABIFLAGS)_$(MACHDEP)_$(MULTIARCH) '$interp
     fi
     # Used to comment out stuff for rebuilding generated files
     GENERATED_COMMENT='#'
diff -r 1d71ce4531ac Lib/sysconfig.py
--- a/Lib/sysconfig.py	Sat Sep 10 16:19:45 2016 +0200
+++ b/Lib/sysconfig.py	Sat Sep 10 19:47:11 2016 +0200
@@ -342,19 +342,13 @@
     return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
 
 
-def _get_sysconfigdata_name(vars=None):
-    if vars is None:
-        return '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
-            abi=sys.abiflags,
-            platform=sys.platform,
-            multiarch=getattr(sys.implementation, '_multiarch', ''),
-        )
-    else:
-        return '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
-            abi=vars['ABIFLAGS'],
-            platform=vars['MACHDEP'],
-            multiarch=vars.get('MULTIARCH', ''),
-        )
+def _get_sysconfigdata_name():
+    return os.environ.get('_SYSCONFIGDATA_NAME',
+        '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
+        abi=sys.abiflags,
+        platform=sys.platform,
+        multiarch=getattr(sys.implementation, '_multiarch', ''),
+    ))
 
 
 def _generate_posix_vars():
@@ -397,7 +391,7 @@
     # _sysconfigdata module manually and populate it with the build vars.
     # This is more than sufficient for ensuring the subsequent call to
     # get_platform() succeeds.
-    name = _get_sysconfigdata_name(vars)
+    name = _get_sysconfigdata_name()
     if 'darwin' in sys.platform:
         import types
         module = types.ModuleType(name)
diff -r 1d71ce4531ac Lib/distutils/sysconfig.py
--- a/Lib/distutils/sysconfig.py	Sat Sep 10 16:19:45 2016 +0200
+++ b/Lib/distutils/sysconfig.py	Sat Sep 10 19:47:28 2016 +0200
@@ -418,11 +418,12 @@
 def _init_posix():
     """Initialize the module as appropriate for POSIX systems."""
     # _sysconfigdata is generated at build time, see the sysconfig module
-    name = '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
+    name = os.environ.get('_SYSCONFIGDATA_NAME',
+        '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
         abi=sys.abiflags,
         platform=sys.platform,
         multiarch=getattr(sys.implementation, '_multiarch', ''),
-    )
+    ))
     _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
     build_time_vars = _temp.build_time_vars
     global _config_vars