only in patch2:
unchanged:
--- sbcl-0.9.3.72.orig/clean.sh
+++ sbcl-0.9.3.72/clean.sh
@@ -71,7 +71,7 @@
 #     building or testing
 #   test-passed
 #     generated by automatic directory-test-thyself procedure
-find . \( \
+find . -name stage1 -prune -o \( \
 	-type l -o \
 	-name '*~' -o \
 	-name '#*#' -o \