Windows SDK version 8.1

When I try to install bcrypt with the following command "npm install bcrypt --python=\Python27\python.exe" I get the following error message:

bcrypt@0.8.7 install C:\Users\Abj\Documents\Github\npm_basics\node_modules\bcrypt node-gyp rebuild

C:\Users\Abj\Documents\Github\npm_basics\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\Platforms\x64\PlatformToolsets\v140\Toolset.targets(36,5): error MSB8036: The Windows SDK version 8.1 was not found. Install the required version of Windows SDK or change the SDK version in the project property pages or by right-clicking the solution and selecting "Retarget solution". [C:\Users\Abj\Documents\Github\npm_basics\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:276:23) 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 6.3.9600 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\Abj\Documents\Github\npm_basics\node_modules\bcrypt gyp ERR! node -v v4.4.5 gyp ERR! node-gyp -v v3.3.1 gyp ERR! not ok npm ERR! Windows_NT 6.3.9600 npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "bcrypt" "--python=Python27python.exe" npm ERR! node v4.4.5 npm ERR! npm v2.15.5 npm ERR! code ELIFECYCLE

npm ERR! bcrypt@0.8.7 install: node-gyp rebuild npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the bcrypt@0.8.7 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 information on how to open an issue for this project with: npm ERR! npm bugs bcrypt npm ERR! Or if that isn't available, you can get their info via: npm ERR! 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\Abj\Documents\Github\npm_basics\npm-debug.log