diff --git a/tool/make-snapshot b/tool/make-snapshot
index 9bccecaf26..4a57e072e3 100755
--- a/tool/make-snapshot
+++ b/tool/make-snapshot
@@ -408,7 +408,7 @@ def package(vcs, rev, destdir, tmp = nil)
       mk << commonmk.gsub(/\{\$([^(){}]*)[^{}]*\}/, "")
       mk << <<-'APPEND'
 
-prereq: clean-cache $(CLEAN_CACHE)
+prepare-package: prereq update-download clean-cache $(CLEAN_CACHE)
 clean-cache $(CLEAN_CACHE): after-update
 touch-unicode-files: _touch-unicode-files
 update-download:: touch-unicode-files
@@ -421,11 +421,10 @@ _touch-unicode-files:
 	touch $(UNICODE_SRC_DATA_DIR)/.unicode-tables.time $(UNICODE_DATA_HEADERS)
       APPEND
       open(clean.add("Makefile"), "w") do |f|
-        f.puts "prereq: update-download"
         f.puts mk
       end
       ENV["CACHE_SAVE"] = "no"
-      system(ENV["MAKE"] || ENV["make"] || "make", "prereq", *args.map {|arg| arg.join("=")})
+      system(ENV["MAKE"] || ENV["make"] || "make", "prepare-package", *args.map {|arg| arg.join("=")})
       clean.push("rbconfig.rb", ".rbconfig.time", "enc.mk")
       print "prerequisites"
     else