title: Build:Cannot find type definition file for webpack-env
body: <p>we have a .net core Asp.net framework SPA. we performed below commands using Nuget package manager console on VS 2017. This would create all the node_modules stuff but while building the project it would throw error and fail "<strong>Build:Cannot find type definition file for 'webpack-env'</strong>". It happens for few of us. For some it would happen randomly. We also tried to get node_modules on our build server using VSTS npm step and it would throw the same error. Any help?</p>
  
  <ol>
  <li>npm init -y (to get/create package.json) </li>
  <li>npm install</li>
  </ol>
  
  <p>FYI: we have a webpack-env folder under @types folder</p>