diff --git a/Makefile b/Makefile
index dc152f7..3b563ed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
-bboc.pdf: bboc.tex
+bboc-good.pdf: bboc.tex
+	rm -f bboc.aux bboc.log bboc.out bboc.toc
 	pdflatex $^
 	pdflatex $^
+	cp bboc.pdf bboc-good.pdf
+