win7系统安装weex-toolkit失败

Question

为什么我在cnpm install -g weex-toolkit时出现以下的问题呢？

[9/10] weex-builder@^0.2.3 installed at node_modules\_weex-builder@0.2.6@weex-bu
ilder
[rx@4.1.0] download ShasumNotMatchError: real sha1:045c8dc3fead00c6dfedfdb8bf8f7
e0f4b69b153 not equal to remote:a5f13ff79ef3b740fe30aa803fb09f98805d4782 (rx@4.1
.0), fail count: 3
Install fail! ShasumNotMatchError: real sha1:045c8dc3fead00c6dfedfdb8bf8f7e0f4b6
9b153 not equal to remote:a5f13ff79ef3b740fe30aa803fb09f98805d4782 (rx@4.1.0)
ShasumNotMatchError: real sha1:045c8dc3fead00c6dfedfdb8bf8f7e0f4b69b153 not equa
l to remote:a5f13ff79ef3b740fe30aa803fb09f98805d4782 (rx@4.1.0)
    at IncomingMessage.readstream.on 
    (C:\Users\Administrator\AppData\Roaming\npm\node_modules\cnpm\node_modules\npminstall\lib\download\npm.js:453:21)
    at emitNone (events.js:91:20)
    at IncomingMessage.emit (events.js:185:7)
    at endReadableNT (_stream_readable.js:974:12)
    at _combinedTickCallback (internal/process/next_tick.js:74:11)
    at process._tickCallback (internal/process/next_tick.js:98:9)
npminstall version: 2.30.0
npminstall args: D:\Program Files\nodejs\node.exe C:\Users\Administrator\AppData
\Roaming\npm\node_modules\cnpm\node_modules\npminstall\bin\install.js --china --
userconfig=C:\Users\Administrator\.cnpmrc --disturl=https://npm.taobao.org/mirro
rs/node --registry=https://registry.npm.taobao.org -g weex-toolkit