Compile WebSite Project with NAnt

I have a website project in Visual Studio 2008. I would like to build this website using MSBuild. I use the following command to build the solution:

msbuild.exe mysolution.sln /t:Rebuild /v:q

After I ran the command, it creates a new folder called precompiled, creates a copy of my project, removes all code files and places 1000 dll files in the bin folder.

Now when I do a "rebuild" from Visual studio, it doesn't do that.

Is there a way to rebuild the project without having it to create the precompiled folder?

Thanks