2.2.100 causes 2.1.500 build failure: The "CheckForImplicitPackageReferenceOverrides" task could not be loaded from the assembly

[mcm-ham]

If I install 2.2.100, and then add global.json to a project to use 2.1.500 I then get the following build failure:

C:\Program Files\dotnet\sdk\2.1.500\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(212,5): error MSB4062: The "CheckForImplicitPackageReferenceOverrides" task could not be loaded from the assembly C:\Program Files\dotnet\sdk\2.1.500\Sdks\Microsoft.NET.Sdk\targets\..\tools\netcoreapp2.0/Microsoft.NET.Build.Tasks.dll. Assembly with same name is already loaded Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask. [C:\repo\netstandard-lib.csproj] [C:\repo\netcoreapp-site.csproj]

If I uninstall 2.2.100 then the project builds fine.

[mcm-ham]

Oops, I see we csproj exec command to call a custom dotnet command so need to investigate that.