I pulled up the [http://developer.mozilla.org/en/docs/Windows_Build_Prerequisites#GNU_Tools_for_Microsoft_Windows_.28Cygwin.29 GNU Tools for Microsoft Windows (Cygwin)] installation guide again, and realized that I have missed out the part where it mentioned <b>make 3.80 (not 3.81!) -- dependency analyzer for software builds (Devel category)</b> as one of the required packages. However, when I reinstalled Cygwin again, it didn't give me an option to choose Make 3.80!! (I think this is a serious issue and should be outlined in the Windows Build Documentation)