Scripty: Extension fails to work in 15.8 Preview 3

Taking a simple script and trying to run the custom tool via the extension in 15.8 Preview 3 fails. The error is: System.TypeLoadException: Could not load type ‘Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace’ from assembly ‘Microsoft.CodeAnalysis.Workspaces.Desktop, Version=2.9.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’. at Scripty.Core.ScriptEngine.<Evaluate>d__6.MoveNext() at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.Start[TStateMachine](TStateMachine& stateMachine) at Scripty.Core.ScriptEngine.Evaluate(ScriptSource source) at Scripty.ScriptyGenerator.GenerateCode(String inputFileContent) in E:\Code\Scripty\src\Scripty.CustomTool\ScriptyGenerator.cs:line 58

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class AppSettings
{
}