Yup, I honestly expected an article about the build environment and stuff like build times. Can you compile Windows from scratch on a regular development machine in a decent time frame? I guess it depends on whether you're thinking of the Windows kernel or Windows the desktop environment.

There was a blog post but its is gone. Here is one describing that blog post:

http://www.winrumors.com/microsoft-employee-details-how-wind...

I posted my own version.

http://batkin.tumblr.com/post/8967355366/building-windows-8

I agree that they could have taken a different angle with the post title, even though it isn't open source. I'm sure many would be interested in hearing about how they build it. I would.

A cursoy search gives this:

http://mkl-testhead.blogspot.com/2011/01/testhead-book-club-...

http://www.developerfusion.com/media/59835/dogfooding-tfs-at...

I am sure there's more content on Channel 9 etc.

Though it's a pretty old, this Microsoft presentation from USENIX 2000 describes how Windows NT development evolved from NT 3.1 through Windows 2000, including details about source control and build machines.

Windows: A Software Engineering Odyssey

https://db.usenix.org/events/usenix-win2000/invitedtalks/luc...