API test errors in Visual Studio

Visual Studio apparently tries to load `GenAPI` into its .NET Framework-based (?) MSBuild process:
```
3>W:\Projects\wpf-math\src\WpfMath.ApiTest\WpfMath.ApiTest.csproj(38,9): error MSB4062: The "Microsoft.DotNet.GenAPI.GenAPITask" task could not be loaded from the assembly C:\Users\fried\.nuget\packages\microsoft.dotnet.genapi\7.0.0-beta.23060.4\build\\..\tools\net472\Microsoft.DotNet.GenAPI.exe. Could not load file or assembly 'file:///C:\Users\fried\.nuget\packages\microsoft.dotnet.genapi\7.0.0-beta.23060.4\tools\net472\Microsoft.DotNet.GenAPI.exe' or one of its dependencies. The system cannot find the file specified. Confirm that the 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.
```

For now, I have no idea how to fix this. `GenAPI` is a Microsoft-produced task, how come it's broken in VS?