some RiscOS stuff I missed before (was only looking for "RISCOS")
diff --git a/Tools/freeze/freeze.py b/Tools/freeze/freeze.py
index 80db69e..d1e024f 100755
--- a/Tools/freeze/freeze.py
+++ b/Tools/freeze/freeze.py
@@ -125,7 +125,7 @@
     # default the exclude list for each platform
     if win: exclude = exclude + [
         'dos', 'dospath', 'mac', 'macpath', 'macfs', 'MACFS', 'posix',
-        'os2', 'ce', 'riscos', 'riscosenviron', 'riscospath',
+        'os2', 'ce',
         ]
 
     fail_import = exclude[:]