corert/global.json

{
  "tools": {
    "dotnet": "2.1.401"
  },
  "native-tools": {
    "cmake": "3.14.2",
    "python3": "3.7.1"
  },
  "msbuild-sdks": {
    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19115.1",
    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19115.1"
  }
}