Index: Lib/compileall.py
===================================================================
--- Lib/compileall.py	(revision 81004)
+++ Lib/compileall.py	(working copy)
@@ -93,12 +93,6 @@
             cache_dir = os.path.dirname(cfile)
         head, tail = name[:-3], name[-3:]
         if tail == '.py':
-            if not legacy:
-                try:
-                    os.mkdir(cache_dir)
-                except OSError as error:
-                    if error.errno != errno.EEXIST:
-                        raise
             if not force:
                 try:
                     mtime = int(os.stat(fullname).st_mtime)
Index: Lib/py_compile.py
===================================================================
--- Lib/py_compile.py	(revision 81004)
+++ Lib/py_compile.py	(working copy)
@@ -123,11 +123,11 @@
             return
     if cfile is None:
         cfile = imp.cache_from_source(file)
-        try:
-            os.mkdir(os.path.dirname(cfile))
-        except OSError as error:
-            if error.errno != errno.EEXIST:
-                raise
+    try:
+        os.makedirs(os.path.dirname(cfile))
+    except OSError as error:
+        if error.errno != errno.EEXIST:
+            raise
     with open(cfile, 'wb') as fc:
         fc.write(b'\0\0\0\0')
         wr_long(fc, timestamp)