Revert r88503 as Benjamin's request.
diff --git a/Lib/lib2to3/__main__.py b/Lib/lib2to3/__main__.py
deleted file mode 100644
index 80688ba..0000000
--- a/Lib/lib2to3/__main__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-import sys
-from .main import main
-
-sys.exit(main("lib2to3.fixes"))
diff --git a/Tools/scripts/2to3 b/Tools/scripts/2to3
index 2eb5dad..fbd4aa6 100755
--- a/Tools/scripts/2to3
+++ b/Tools/scripts/2to3
@@ -1,4 +1,5 @@
#!/usr/bin/env python
-import runpy
+import sys
+from lib2to3.main import main
-runpy.run_module('lib2to3', run_name='__main__', alter_sys=True)
+sys.exit(main("lib2to3.fixes"))