Index: Makefile.pre.in
===================================================================
--- Makefile.pre.in	(revision 75043)
+++ Makefile.pre.in	(working copy)
@@ -1147,7 +1147,7 @@
 	for i in $(SRCDIRS); do etags -a $$i/*.[ch]; done
 
 # Sanitation targets -- clean leaves libraries, executables and tags
-# files, which clobber removes those as well
+# files, which clobber removes as well
 pycremoval:
 	find $(srcdir) -name '*.py[co]' -exec rm -f {} ';'
 
@@ -1167,6 +1167,7 @@
 	find . -name '*.s[ol]' -exec rm -f {} ';'
 	find build -name 'fficonfig.h' -exec rm -f {} ';' || true
 	find build -name 'fficonfig.py' -exec rm -f {} ';' || true
+	-rm -f Lib/lib2to3/*Grammar*.pickle
 
 profile-removal:
 	find . -name '*.gc??' -exec rm -f {} ';'