Need ranlib for Mac.
diff --git a/src/Make.HP-UX-9000 b/src/Make.HP-UX-9000
index edbdc11..5b5780e 100644
--- a/src/Make.HP-UX-9000
+++ b/src/Make.HP-UX-9000
@@ -4,3 +4,4 @@
 AR=ar
 ARFLAGS=rvc
 NAN=nan64.$O
+RANLIB=true