1 files changed, 5 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 26d582c72..df5caf0b7 100644
--- a/Makefile
+++ b/Makefile
@@ -156,7 +156,10 @@ endif
 
 MAKE_OPTS := --warn-undefined-variable --no-builtin-rules
 
-submake: alienclean
+bin:
+	mkdir bin
+
+submake: alienclean | bin
 	$(MAKE) $(MAKE_OPTS) -f Makefile.build $(MAKECMDGOALS)
 
 noconfig:
@@ -214,7 +217,7 @@ archclean: clean-ide optclean voclean
 	rm -f $(ALLSTDLIB).*
 
 optclean:
-	rm -f $(COQTOPEXE) $(CHICKEN) $(TOPBIN)
+	rm -f $(COQTOPEXE) $(CHICKEN) $(TOPBINOPT)
 	rm -f $(TOOLS) $(PRIVATEBINARIES) $(CSDPCERT)
 	find . -name '*.cmx' -o -name '*.cmx[as]' -o -name '*.[soa]' -o -name '*.so' | xargs rm -f