Building Firefox

So I set out late this evening to try and build Firefox. I read a few of the blogs on the subject and decided to use Simon Jung's tutorial. Unfortunately however, I encountered an error that I could not correct. This is my output when I issue the following build command:

make -f client.mk build MOZ_CO_PROJECT=browser

In addition to the error I'm getting, my .mozconfig.mk file also keeps getting overwritten with the following version:

# gmake
# This file is automatically generated for client.mk.
# Do not edit. Edit /c/Documents and Settings/xRayon.AKDESKTOP/.mozconfig instead.
# To create a new .mozconfig file, you can visit,
# http://webtools.mozilla.org/build/config.cgi

# PATH=/local/bin:/c/mozilla-build//wget:/c/mozilla-build//7zip:/c/mozilla-build//blat261/full:/c/mozilla-build//python25:/c/mozilla-build//svn-win32-1.4.2/bin:/c/mozilla-build//upx203w:/c/mozilla-build//xemacs/XEmacs-21.4.19/i586-pc-win32:/c/mozilla-build//info-zip:/c/mozilla-build//nsis-2.22:.:/usr/local/bin:/mingw/bin:/bin:/c/Program Files/Microsoft Visual Studio 8/Common7/IDE:/c/Program Files/Microsoft Visual Studio 8/VC/BIN:/c/Program Files/Microsoft Visual Studio 8/Common7/Tools:/c/Program Files/Microsoft Visual Studio 8/Common7/Tools/bin:/c/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/bin:/c/Program Files/Microsoft Visual Studio 8/SDK/v2.0/bin:/c/WINDOWS/Microsoft.NET/Framework/v2.0.50727:/c/Program Files/Microsoft Visual Studio 8/VC/VCPackages:/c/WINDOWS/System32:/c/WINDOWS:/c/WINDOWS/System32/Wbem:/c/mozilla-build/moztools/bin

This happens every time I run the build (or clean) command. I have no idea what the error message at the end refers to or why the configuration file is getting overwritten but will be investigating it further tomorrow. The .mozconfig.mk file (/c/Documents and Settings/xRayon.AKDESKTOP/.mozconfig) the overwritten configuration file is refering to also doesnt exist by the way. Updates to follow.