--- Jambase
+++ Jambase
@@ -1038,7 +1038,11 @@ else if $(UNIX)
 # General defaults; a lot like UNIX
 #
 
-	AR				?= ar rusc ;
+	if ! $(AR) {
+		AR		= ar rusc ;
+	} else {
+		AR		+= rusc ;
+	}
 	AS				?= as ;
 	ASFLAGS			?= ;
 	AWK				?= awk ;