Migration in 2.1-preview2 fails with "Your startup project doesn't reference Microsoft.EntityFrameworkCore.Design"

Using the latest 2.1 preview I get this error when applying migrations through dotnet exec. Adding the package reference does not help. Same command was working in 2.0.2, see example repo.

@bricelam did not think it was related to #11437 so I opened a separate issue.

Command:
$publishDir = '..\Web\bin\Debug\netcoreapp2.1\publish\'
dotnet exec --depsfile $publishDir\Web.deps.json --additionalprobingpath $home\.nuget\packages ef.dll database update --assembly $publishDir\Web.dll --startup-assembly $publishDir\Web.dll --project-dir $publishDir --data-dir $publishDir --verbose --root-namespace Data

Exception message:
Your startup project 'Web' doesn't reference Microsoft.EntityFrameworkCore.Design. This package is required for the Entity Framework Core Tools to work. Ensure your startup project is correct, install the package, and try again.

Stack trace:
Using assembly 'Web'.
Using startup assembly 'Web'.
Using application base 'C:\Dev\netcore-dbupgrade-issue-2.1.300\Web\bin\Debug\netcoreapp2.1\publish'.
Using working directory 'C:\Dev\netcore-dbupgrade-issue-2.1.300\Data'.
Using root namespace 'Data'.
Using project directory '..\Web\bin\Debug\netcoreapp2.1\publish\'.
Microsoft.EntityFrameworkCore.Tools.CommandException: Your startup project 'Web' doesn't reference Microsoft.EntityFrameworkCore.Design. This package is required for the Entity Framework Core Tools to work. Ensure your startup project is correct, install the package, and try
again. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.EntityFrameworkCore.Design, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks, IntPtr ptrLoadContextBinder)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, IntPtr ptrLoadContextBinder)
   at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
   at Microsoft.EntityFrameworkCore.Tools.ReflectionOperationExecutor..ctor(String assembly, String startupAssembly, String projectDir, String dataDirectory, String rootNamespace, String language)
   at Microsoft.EntityFrameworkCore.Tools.Commands.ProjectCommandBase.CreateExecutor()
   --- End of inner exception stack trace ---
   at Microsoft.EntityFrameworkCore.Tools.Commands.ProjectCommandBase.CreateExecutor()
   at Microsoft.EntityFrameworkCore.Tools.Commands.DatabaseUpdateCommand.Execute()
   at Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
   at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)

Steps to reproduce

Working ex. repo: https://github.com/AndersSahlin/netcore-dbupgrade-issue

Upgraded repo with issue: https://github.com/AndersSahlin/netcore-dbupgrade-issue-2.1.300

Further technical details

EF Core version: 2.1.0-preview2-final Database Provider: Microsoft.EntityFrameworkCore.SqlServer Operating system: Win10 IDE: VS Code 1.22.2

[benday]

@bricelam — is that going to be the guaranteed official path on Windows? Is there a similar official path on Linux?

[bricelam]

cc @benday