The platform "win32" is incompatible with this module.

[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.2.11: The platform "win32" is incompatible with this module.
info "fsevents@1.2.11" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
error An unexpected error occurred: "ENOENT: no such file or directory, copyfile 'C:\Users\niu\AppData\Local\Yarn\Cache\v6\npm-big-js-3.2.0-a5fc298b81b9e0dca2e458824784b65c52ba588e-integrity\node_modules\big.js\big.js' -> 'E:\webpack\webpack-demo1\node_modules\html-webpack-plugin\node_modules\big.js\big.js'".
info If you think this is a bug, please open a bug report with the information provided in "E:\webpack\webpack-demo1\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

解决方法

yarn config set ignore-engines true