I had the same problem. Getting a newer version of NMake fixed it.
Seems like you can't get a standalone version of NMake newer than the 1.5 (every site links to this old download). Fortunately you may download for example a recent Visual Studio Express (which is a free download) and get NMake from here (it's then located in <visual_install_directory\VC\bin\nmake.exe>).
Hope this will Help.
For your information, I got nmake version "9.00.30729.01" from Visual Studio Express 9.