我想在安装了Visual Studio Community 2015，Python v2.7.3的Windows
10计算机上安装bcrypt，但出现以下错误。

节点版本v4.2.1 node-gyp v3.0.3

npm install bcrypt


C:\Users\ASMIN\Desktop\M2\app>npm install bcrypt
npm WARN package.json eapp@1.0.0 No description
npm WARN package.json eapp@1.0.0 No repository field.
npm WARN package.json eapp@1.0.0 No README data

> bcrypt@0.8.5 install C:\Users\ASMIN\Desktop\M2\app\node_modules\bcrypt
> node-gyp rebuild




 C:\Users\ASMIN\Desktop\M2\app\node_modules\bcrypt>if not defined npm_config_node_gyp (node "C:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node
    -gyp.js" rebuild )  else (node  rebuild )
    Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch.
    C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.CppBuild.targets(366,5): warning MSB8003: Could not find WindowsSDKDir variable from the registry.  TargetFrameworkVersio
    n or PlatformToolset may be set to an invalid version number. [C:\Users\ASMIN\Desktop\M2\app\node_modules\bcrypt\build\bcrypt_lib.vcxproj]
    TRACKER : error TRK0005: Failed to locate: "CL.exe". The system cannot find the file specified. [C:\Users\ASMIN\Desktop\M2\app\node_modules\bcrypt\build\bcrypt_lib.vcxproj]


    gyp ERR! build error
    gyp ERR! stack Error: `C:\Program Files (x86)\MSBuild\14.0\bin\msbuild.exe` failed with exit code: 1
    gyp ERR! stack     at ChildProcess.onExit (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\build.js:270:23)
    gyp ERR! stack     at emitTwo (events.js:87:13)
    gyp ERR! stack     at ChildProcess.emit (events.js:172:7)
    gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
    gyp ERR! System Windows_NT 10.0.10240
    gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
    gyp ERR! cwd C:\Users\ASMIN\Desktop\M2\app\node_modules\bcrypt
    gyp ERR! node -v v4.2.1
    gyp ERR! node-gyp -v v3.0.3
    gyp ERR! not ok
    npm ERR! Windows_NT 10.0.10240
    npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "bcrypt"
    npm ERR! node v4.2.1
    npm ERR! npm  v2.14.7
    npm ERR! code ELIFECYCLE

    npm ERR! bcrypt@0.8.5 install: `node-gyp rebuild`
    npm ERR! Exit status 1
    npm ERR!
    npm ERR! Failed at the bcrypt@0.8.5 install script 'node-gyp rebuild'.
    npm ERR! This is most likely a problem with the bcrypt package,
    npm ERR! not with npm itself.
    npm ERR! Tell the author that this fails on your system:
    npm ERR!     node-gyp rebuild
    npm ERR! You can get their info via:
    npm ERR!     npm owner ls bcrypt
    npm ERR! There is likely additional logging output above.

    npm ERR! Please include the following file with any support request:
    npm ERR!     C:\Users\ASMIN\Desktop\M2\app\npm-debug.log