Unable to restore Microsoft.DotNet.Arcade.Sdk when building ASP.NET Core from source

[nithyav2017]

I have cloned dotnet/aspnetcore
and when I run .\restore.cmd, it reports missing libraries.

The main issue is the Microsoft.DotNet.Arcade.Sdk. I have tried the following steps:

1. Create new project
   -dotnet new classlib

   • Updated the .csproj to include:<Project Sdk="Microsoft.DotNet.Arcade.Sdk/11.0.0-beta.25524.106">
   • Ran: dotnet restore --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json
   • Verified the package:cd C:\dev\aspnetcore powershell -ExecutionPolicy Bypass -NoProfile -File .\eng\build.ps1 -Bootstrap

   -This fails with: MSB1001: Unknown switch ,Switch: -bootstrap

   I seems this is due to an older version of the Arcade SDK. I am looking for guidance to download and restore the correct version (possibly 11.0.0-beta.25524.106) so that the build can succeed.

Environment:

• VS 2026 insider/VS2022
  -.NET SDK installed:
  • 9.0.306 [C:\Program Files\dotnet\sdk]
    -10.0.100-rc.1.25420.111 [C:\dev\aspnetcore.dotnet\sdk]
    -10.0.100-rc.1.25451.107 [C:\Program Files\dotnet\sdk]
    -10.0.100-rc.2.25502.107 [C:\Program Files\dotnet\sdk]