aspnetcore/global.json

{
  "sdk": {
    "version": "3.0.100-preview4-011136"
  },
  "msbuild-sdks": {
    "Yarn.MSBuild": "1.13.0",
    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19252.2"
  }
}