diff --git a/core/base_rules.mk b/core/base_rules.mk
index d03050b..188c352 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -257,7 +257,11 @@
 ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),micro)
 $(proto_java_sources_file_stamp): PRIVATE_PROTO_JAVA_OUTPUT_OPTION := --javamicro_out
 else
+  ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
+$(proto_java_sources_file_stamp): PRIVATE_PROTO_JAVA_OUTPUT_OPTION := --javanano_out
+  else
 $(proto_java_sources_file_stamp): PRIVATE_PROTO_JAVA_OUTPUT_OPTION := --java_out
+  endif
 endif
 $(proto_java_sources_file_stamp): PRIVATE_PROTOC_FLAGS := $(LOCAL_PROTOC_FLAGS)
 $(proto_java_sources_file_stamp) : $(proto_sources_fullpath) $(PROTOC)
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 000ba9e..81a9493 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -118,7 +118,7 @@
 LOCAL_RENDERSCRIPT_TARGET_API:=
 LOCAL_BUILD_HOST_DEX:=
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
-LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,full
+LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
 LOCAL_PROTOC_FLAGS:=
 LOCAL_NO_CRT:=
 LOCAL_PROPRIETARY_MODULE:=
diff --git a/core/java.mk b/core/java.mk
index 7c8c894f..b73bc93 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -52,7 +52,11 @@
 ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),micro)
     LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-2.3.0-micro
 else
+  ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
+    LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-2.3.0-nano
+  else
     LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-2.3.0-lite
+  endif
 endif
 endif
 
diff --git a/envsetup.sh b/envsetup.sh
index 61bdc3d..ae2ff93 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -159,7 +159,7 @@
 
     export ANDROID_TOOLCHAIN=$ANDROID_EABI_TOOLCHAIN
     export ANDROID_QTOOLS=$T/development/emulator/qtools
-    export ANDROID_DEV_SCRIPTS=$T/development/scripts
+    export ANDROID_DEV_SCRIPTS=$T/development/scripts:$T/prebuilts/devtools/tools
     export ANDROID_BUILD_PATHS=$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN$ARM_EABI_TOOLCHAIN_PATH$CODE_REVIEWS:$ANDROID_DEV_SCRIPTS:
     export PATH=$ANDROID_BUILD_PATHS$PATH