Code First Migrations without NuGet

I'm wondering how I can use Entity Framework's Code First Migrations without using NuGet at all (so no commands via the package manager console).

I tried the following:

Database-Context

public sealed class MyContext : DbContext
{
  private const string ConnectionStringName = "MyDatabase";

  public MyContext()
    : base(ConnectionStringName)
  {}

  protected override void OnModelCreating(DbModelBuilder modelBuilder)
  {
    SetupMyModel(modelBuilder);
  }
}

Migration-Configuration

public class MyMigrationConfiguration : DbMigrationsConfiguration<MyContext>
{
  public MyMigrationConfiguration()
  {
    AutomaticMigrationsEnabled = false;
  }
}

Database-Initializer

System.Data.Entity.Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, MyMigrationConfiguration>());

InitialDatabaseCreation Migration

public class InitialDatabaseCreation : DbMigration, IMigrationMetadata
{
  public override void Up()
  {
    CreateTable("dbo.MyModel",
      c => new
      {
        Id = c.Guid(false, true),
        SomeProperty = c.Int(false)
      })
      .PrimaryKey(x => x.Id);
  }

  public override void Down()
  {
    DropTable("dbo.MyModel");
  }

  public string Id
  {
    get { return "0001_InitialDatabaseCreation"; }
  }

  public string Source
  {
    get { return null; }
  }

  public string Target
  {
    get { return Id; }
  }
}

As you can see, I wrote a context, a migration configuration and the migration itself. For the Migration, I'm not sure, if I implemented the IMigrationMetadata correcly. For the Target I just use the id, because I don't want to have any automatic migrations or the ability to use the package manager console. I think, this should be fine here?

I set a breakpoint at the Up method and debugged it, but it does not stop there, which means it doesn't get executed.

Therefor I want to know how to use the EF Code First migrations when writing everything manually.