--- a/cblas/Makefile	2012-01-17 18:18:16.000000000 +0000
+++ b/cblas/Makefile	2012-01-18 21:37:14.917387707 +0000
@@ -109,7 +109,7 @@
 alllib: $(CBLIBDIR) allprecision
 
 $(CBLIBDIR):
-	mkdir $(CBLIBDIR)
+	mkdir -p $(CBLIBDIR)
 sreal1:
 	( cd src ; make slib1)
 dreal1: