diff --git a/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.dev.o b/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.dev.o
deleted file mode 100644
index 56d447e4..00000000
Binary files a/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.dev.o and /dev/null differ
diff --git a/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.prod.o b/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.prod.o
deleted file mode 100644
index 7d818096..00000000
Binary files a/build/systemMenu_tools/SystemLogReader/ARM9.TWL/nandfirm/nandfirm.prod.o and /dev/null differ
diff --git a/build/systemMenu_tools/SystemLogReader/make.rb b/build/systemMenu_tools/SystemLogReader/make.rb
index c52e6a31..9646ba3b 100755
--- a/build/systemMenu_tools/SystemLogReader/make.rb
+++ b/build/systemMenu_tools/SystemLogReader/make.rb
@@ -1,7 +1,8 @@
 #!ruby
-# build TwlIPL Root -> build nandfirm -> convert nandfirm -> 
+# build TwlIPL Root -> convert nandfirm -> 
 #   build systemlogreader -> build gcdfirm
-# 実行時引数に"dev"を渡すと開発ビルド(default)、"prod"を渡すと量産ビルドを生成
+# 実行時引数に"dev"を渡すと開発ビルド(default)、"prod"なら量産ビルド、"full"なら両方を生成。
+# また一緒に"short"を指定するとTwlIPLRootのビルドをやり直さない短縮ビルドを行う。
 
 def putex(str)
 	# puts command and execute
@@ -20,36 +21,48 @@ def buildgcd(buildtype, prodopt, shortbuild)
 			putex "make -f Makefile.full clean; " +
 						 "makesp CYGPATH_NOCMD=TRUE -j 2 -f Makefile.full TWL_FINALROM=TRUE #{prodopt}"
 		end
-
-		# build nandfirm
-		Dir.chdir(ENV['TWL_IPL_RED_ROOT'] + "/build/nandfirm/menu-launcher") do
-			putex "make clean; make TWL_FINALROM=TRUE #{prodopt}"
-			nandfirm = Dir.glob("menu_launcher*#{buildtype}.nand")
-			if nandfirm.none?
-				puts "build nandfirm failed."
-				exit
-			else
-				nandfirm = nandfirm[0]
-			end
-
-			
-			putex "$TWLSDK_ROOT/tools/bin/bin2obj.TWL.exe #{nandfirm} nandfirm.#{buildtype}.o " +
-							"-b nandfirm_begin -e nandfirm_end"
-			putex "cp nandfirm.#{buildtype}.o #{Rootdir}/ARM9.TWL/nandfirm/"
-		end
 	end
 
+	# build nandfirm
+	nandfirmDir = "#{ENV['TWL_IPL_RED_PRIVATE_ROOT']}/resources/nandfirm_bin/"
+	nandfirm = 
+		if buildtype == "dev"
+			"#{nandfirmDir}/menu_launcher.nand"
+		else
+			"#{nandfirmDir}/menu_launcher-FINALROM-2435-8325.prod.nand"
+			end
+	
+	unless FileTest.exist? nandfirm
+		puts "[ERROR] prebuilt nandfirm is not found. : #{nandfirm}"
+		exit
+	end
+
+	putex "mkdir -p #{Rootdir}/ARM9.TWL/nandfirm"	
+	putex "$TWLSDK_ROOT/tools/bin/bin2obj.TWL.exe #{nandfirm} #{Rootdir}/ARM9.TWL/nandfirm/nandfirm.#{buildtype}.o " +
+		"-b nandfirm_begin -e nandfirm_end"
+
 	# build systemlogreader
 	putex "makesp CYGPATH_NOCMD=TRUE -j 2 clean; makesp CYGPATH_NOCMD=TRUE -j 2 TWL_FINALROM=TRUE #{prodopt}"
+	
+	putex "rm $TWL_IPL_RED_ROOT/build/gcdfirm/memory-launcher-writer/SystemLogReader.srl"
+		
 	Dir.chdir(Rootdir + "/ARM9.TWL/bin/ARM9-TS.LTD.thumb/Rom") do
 		if buildtype == "dev"
 			putex 'cp ./SystemLogReader.srl $TWL_IPL_RED_ROOT/build/gcdfirm/memory-launcher-writer/'
 		else
 			# 量産用の場合はsrlにマスタリングをかける
-			putex "mastering.TWL.exe SystemLogReader.srl SystemLogReader.srl.master -s -t"
+			masterbin = ENV['TWL_IPL_RED_PRIVATE_ROOT'] + "/tools/bin/mastering.TWL.exe"
+			masterini = ENV['TWL_IPL_RED_PRIVATE_ROOT'] + "/tools/bin/mastering.TWL.ini"
+
+			putex "#{masterbin} SystemLogReader.srl SystemLogReader.srl.master -s -t -i #{masterini}"
 			putex "cp ./SystemLogReader.srl.master $TWL_IPL_RED_ROOT/build/gcdfirm/memory-launcher-writer/SystemLogReader.srl"
 		end
 	end
+	
+		unless FileTest.exist? "#{ENV['TWL_IPL_RED_ROOT']}/build/gcdfirm/memory-launcher-writer/SystemLogReader.srl"
+		puts "[ERROR] building SystemLogReader failed."
+		exit
+	end
 
 	# build memory_launcher
 	Dir.chdir(ENV['TWL_IPL_RED_ROOT'] + "/build/nandfirm/memory-launcher") do
@@ -58,19 +71,31 @@ def buildgcd(buildtype, prodopt, shortbuild)
 
 	# build memorylauncherwriter
 	Dir.chdir(ENV['TWL_IPL_RED_ROOT'] + "/build/gcdfirm/memory-launcher-writer") do
-		putex "make clean; make TWL_FINALROM=TRUE #{prodopt}"
+		putex "make clean; make TWL_FINALROM=TRUE #{prodopt} APPEND_SRL=./SystemLogReader.srl"
 		putex "cp ./memory_launcher_writer-FINALROM.gcd " + 
 				"$TWL_IPL_RED_ROOT/build/systemMenu_tools/SystemLogReader/memory_launcher_writer-FINALROM.#{buildtype}.gcd -f"
 	end
 end
 
 
+# ===== main script =====
+
+# nandfirmが必要なのでPRIVATE_ROOT必須
+unless ENV['TWL_IPL_RED_PRIVATE_ROOT']
+	puts "[ERROR] env valiable: TWL_IPL_RED_PRIVATE_ROOT is needed."
+	exit
+end
+
 Rootdir = ENV['TWL_IPL_RED_ROOT'] + '/build/systemMenu_tools/SystemLogReader'
 prodopt = ""
 shortbuild = false
 
 # default buildtype = dev
-if ARGV.none? || ARGV.include?('dev')
+if ARGV.none?
+	puts "usage:"
+	puts "ruby make.rb [dev|prod|full] [short]"
+	exit
+elsif ARGV.include?('dev')
 	build = ["dev"]
 	opt = ["FIRM_USE_PRODUCT_KEYS="]
 elsif ARGV.include?("prod")
@@ -80,7 +105,7 @@ elsif ARGV.include? "full"
 	build = ["dev", "prod"]
 	opt = ["FIRM_USE_PRODUCT_KEYS=", "FIRM_USE_PRODUCT_KEYS=TRUE"]
 else
-	puts "invalid arguments."
+	puts "[ERROR] invalid arguments."
 	exit
 end