Unable to build project with latest release

I create an F# project as per the readme.txt

```

net6.0
true

```

The version downloaded is 1.8.0-alpha1

Build fails with

> Error The target platform should specified as Windows in the project file. For example, net6.0-windows

Then I manually change the project

```

net6.0-windows
true

```

now I get 2 build errors

> MSB4064 The "RollForward" parameter is not supported by the "CreateExcelAddIn" task loaded from assembly: ExcelDna.AddIn.Tasks, Version=1.1.0.0, Culture=neutral, PublicKeyToken=f225e9659857edbe from the path: C:\Users\franco.tiveron\.nuget\packages\exceldna.addin\1.7.0\tools\net452\ExcelDna.AddIn.Tasks.dll. Verify that the parameter exists on the task, the points to the correct assembly, and it is a settable public instance property. NinjaTrader.Excel C:\Users\franco.tiveron\.nuget\packages\exceldna.addin\1.8.0-alpha1\build\ExcelDna.AddIn.targets 256
>
> MSB4063 The "CreateExcelAddIn" task could not be initialized with its input parameters. NinjaTrader.Excel C:\Users\franco.tiveron\.nuget\packages\exceldna.addin\1.8.0-alpha1\build\ExcelDna.AddIn.targets 231
>

Finally I downgrade to the latest stable

```

net6.0-windows
true

```

Now the build succeeds and I can debug (F5). however. no -packed.xll files are in the output folder