How to run HelloWorld at CoreCLR

I download HelloWorld sample code of corefxlab at GitHub， build and successfully run on my windows.

And I download the coreclr source code, build, try to run the HelloWorld on coreclr following the steps described at http://blogs.msdn.com/b/dotnet/archive/2015/02/03/coreclr-is-now-open-source.aspx?Redirected=true&PageIndex=2，

1. Modify CoreCLR to your heart’s content
2. Build CoreCLR via build.cmd x64 release
3. Copy the following files from coreclr\binaries\x64\release tocorfxlab\demos\CoreClrConsoleApplications\HelloWorld\NotYetPackages\CoreCLR:
   • coreclr.dll
   • CoreConsole.exe
   • mscorlib.dll
4. Rebuild HelloWorld.sln (either using the command line or in VS)

Seems it's useless. If it should work, why the HelloWorld exe will search the folder ‘NotYetPackages\CoreCLR’?

If not, How can I use the coreclr my own build to run the HelloWorld? thanks.