if gyp error happened, try below steps to fix the problem.

install Node.js 9.11.2, if not working then: 

1. firstly make sure nvm-windows version, 1.1.0 is not supported to retrieve node version list which new version nvm-windows will get from [node offical](https://nodejs.org/en/download/releases/). 
So upgrade firstly and see work or not (from 1.1.0 to 1.16 for me)

1. `npm install node-gyp`(https://github.com/nodejs/node-gyp#installation)

1. install windows-build-tools `npm install --global --production windows-build-tools`

1. set python path
`npm config set python C:/Users/\_\_user\_\_/.windows-build-tools/python27/python.exe`