在编译项目的时候出现 Using prebuilt externals ./build_native.sh: 行 89: ./work/cocos2d/android-ndk-r7/ndk-build: 没有那个文件或目录

小弟今天尝试在ubuntu下搭建cocos2dx环境。环境变量和设置如下:

create-android-project.sh 文件
# set environment paramters
NDK_ROOT_LOCAL=“/home/lion/cocos2d/android-ndk-r7”
ANDROID_SDK_ROOT_LOCAL=“/home/lion/work/android-sdk-linux”

profile 文件
#set NDK env
export NDK_ROOT=~/work/cocos2d/android-ndk-r7
export PATH=$PATH:$NDK_ROOT

android-ndk-r7 绝对路径
/home/lion/cocos2d/android-ndk-r7

android sdk 绝对路径
/home/lion/work/android-sdk-linux

现在可以使用 create-android-project.sh来创建项目

但是在进入到项目中,执行build_native.sh时,出现

NDK_ROOT = ./work/cocos2d/android-ndk-r7
COCOS2DX_ROOT = /home/lion/work/cocos2d/cocos2d-2.0-x-2.0.4/cocos2d-2.0-x-2.0.4/Demo/proj.android/…/…
APP_ROOT = /home/lion/work/cocos2d/cocos2d-2.0-x-2.0.4/cocos2d-2.0-x-2.0.4/Demo/proj.android/…
APP_ANDROID_ROOT = /home/lion/work/cocos2d/cocos2d-2.0-x-2.0.4/cocos2d-2.0-x-2.0.4/Demo/proj.android
Using prebuilt externals
./build_native.sh: 行 89: ./work/cocos2d/android-ndk-r7/ndk-build: 没有那个文件或目录

我一直在调试环境变量,不知道哪里出了问题,请问这是怎么回事?