diff --git a/build/buildtools/@privatedefs b/build/buildtools/@privatedefs
new file mode 100644
index 0000000..965cc8f
--- /dev/null
+++ b/build/buildtools/@privatedefs
@@ -0,0 +1,21 @@
+#! make -f
+#----------------------------------------------------------------------------
+# Project:  TwlSDK - @privatedefs
+# File:     Makefile
+#
+# Copyright 2007 Nintendo.  All rights reserved.
+#
+# These coded insructions, statements, and computer programs contain
+# proprietary information of Nintendo of America Inc. and/or Nintendo
+# Company Ltd., and are protected by Federal copyright law.  They may
+# not be disclosed to third parties or copied or duplicated in any form,
+# in whole or in part, without the prior written consent of Nintendo.
+#
+# $Date:: 2007-07-31#$
+# $Rev: 387 $
+# $Author: terui $
+#----------------------------------------------------------------------------
+
+TWL_WITH_ARM7	:=	TRUE
+
+#===== End of @privatedefs =====
diff --git a/build/buildtools/_privatedefs b/build/buildtools/_privatedefs
new file mode 100644
index 0000000..9d489d3
--- /dev/null
+++ b/build/buildtools/_privatedefs
@@ -0,0 +1,21 @@
+#! make -f
+#----------------------------------------------------------------------------
+# Project:  TwlSDK - _privatedefs
+# File:     Makefile
+#
+# Copyright 2007 Nintendo.  All rights reserved.
+#
+# These coded insructions, statements, and computer programs contain
+# proprietary information of Nintendo of America Inc. and/or Nintendo
+# Company Ltd., and are protected by Federal copyright law.  They may
+# not be disclosed to third parties or copied or duplicated in any form,
+# in whole or in part, without the prior written consent of Nintendo.
+#
+# $Date:: 2007-07-31#$
+# $Rev: 387 $
+# $Author: terui $
+#----------------------------------------------------------------------------
+
+TWL_PRIVATE	:=	TRUE
+
+#===== End of _privatedefs =====
diff --git a/build/buildtools/commondefs b/build/buildtools/commondefs
index 53ff0bb..6eabd23 100644
--- a/build/buildtools/commondefs
+++ b/build/buildtools/commondefs
@@ -229,16 +229,6 @@ include	$(NITROSDK_ROOT)/build/buildtools/commondefs
 
 #----------------------------------------------------------------------------
 
-ifeq	($(NITRO_PRIVATE),TRUE)
-TWL_PRIVATE		:= TRUE
-endif
-
-ifeq	($(NITRO_WITH_ARM7),TRUE)
-TWL_WITH_ARM7	:= TRUE
-endif
-
-#----------------------------------------------------------------------------
-
 ### Global Library resettings
 
 GINCLUDES		:= $(TWL_INCDIR) $(GINCLUDES)
@@ -265,6 +255,13 @@ TWL_INSTALL_COMPONENTSDIR	:= $(TWL_INSTALL_ROOT)/components
 TWL_INSTALL_ADDINS	:= $(TWL_INSTALL_ROOT)/add-ins
 
 
+#----------------------------------------------------------------------------
+#  PRIVATE FLAGS
+#
+-include $(TWL_BUILDTOOLSDIR)/_privatedefs
+-include $(TWL_BUILDTOOLSDIR)/@privatedefs
+
+
 #----------------------------------------------------------------------------
 #  Compiler flags
 #
diff --git a/build/libraries/Makefile b/build/libraries/Makefile
index 956d78d..81f63b3 100644
--- a/build/libraries/Makefile
+++ b/build/libraries/Makefile
@@ -25,7 +25,6 @@ SUBDIRS		= \
 		  os		\
 		  pxi		\
 		  mi		\
-		  vlink		\
 		  spi		\
 		  ctrdg		\
 		  aes		\
@@ -33,13 +32,19 @@ SUBDIRS		= \
 		  cdc		\
 		  snd		\
 		  camera	\
-		  cs		\
-		  fatfs		\
 		  devices	\
 		  dsp		\
 		  el		\
 		  sample_dll	\
 
+ifdef	TWL_PRIVATE
+SUBDIRS		+= \
+		  vlink		\
+		  cs		\
+		  fatfs		\
+
+endif
+
 #----------------------------------------------------------------------------
 export	NITRO_BLXCHECKED = yes
 
diff --git a/build/libraries/cs/_ b/build/libraries/cs/_
new file mode 100644
index 0000000..e69de29
diff --git a/build/libraries/devices/Makefile b/build/libraries/devices/Makefile
index 73a8cd3..65a48c4 100644
--- a/build/libraries/devices/Makefile
+++ b/build/libraries/devices/Makefile
@@ -21,8 +21,13 @@ include	$(TWLSDK_ROOT)/build/buildtools/commondefs
 #----------------------------------------------------------------------------
 
 SUBDIRS		= \
+
+ifdef	TWL_PRIVATE
+SUBDIRS		+= \
 		  sdmc		\
 
+endif
+
 #----------------------------------------------------------------------------
 export	NITRO_BLXCHECKED = yes
 
diff --git a/build/libraries/devices/sdmc/_ b/build/libraries/devices/sdmc/_
new file mode 100644
index 0000000..e69de29
diff --git a/build/libraries/fatfs/_ b/build/libraries/fatfs/_
new file mode 100644
index 0000000..e69de29