Can't Enable-Migrations targeting netcoreapp3.0

Steps to reproduce

With a brand new class library I can’t enable migrations when targeting netcoreapp3.0 . It works if I change to net48 or dual target net48;netcoreapp3.0

PM> Enable-Migrations
Unhandled exception. System.IO.FileLoadException: Could not load file or assembly 'C:\Users\majohnson\.nuget\packages\entityframework\6.3.0\tools\netcoreapp3.0\any\ef6.dll'. The located assembly's manifest definition does not match the assembly reference. (0x80131040)
File name: 'C:\Users\majohnson\.nuget\packages\entityframework\6.3.0\tools\netcoreapp3.0\any\ef6.dll'

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="EntityFramework" Version="6.3.0" />
  </ItemGroup>

</Project>

using System.Data.Entity;
using System.Data.Entity.Infrastructure;

namespace Ef6 {
    
    public class MyContextFactory : IDbContextFactory<MyContext> {
        public MyContext Create() {
            return new MyContext(
                "Server=(localdb)\\mssqllocaldb;Database=MyContext;Trusted_Connection=True;MultipleActiveResultSets=true");
        }
    }
    
    public class MyContext : DbContext {
        public MyContext(string connectionString) : base(connectionString) { }
        
        public DbSet<MyTable> MyTables { get; set; }
    }
    
    public class MyTable {
        public int Id { get; set; }
    }
}

Further technical details

EF version: 6.3 Database Provider: (e.g. EntityFramework.SqlServer) Operating system: (e.g. Windows 10) Windows 10 IDE: (e.g. Visual Studio 2017 15.6) VS 2019 16.4 Preview 1

dotnet --version 3.0.100

[ajcvickers]

Thanks Brice. Closing this as won’y fix, since the workaround is easy.

[ajcvickers]

@centreboard @bricelam I think this only happens when the project/solution is called “Ef6”. I renamed it all to “NotSix” and it started working.