GAE_WINDEPS must be set wrong.
The packages currently supplied all have top level folder 'gae-deps' in them, did you create another directory called gae-deps and extract to that ? If so you may need to point it at gae-deps/gae-deps
You need to point at the directory, $(Where_you_extracted)/gae-deps/
This folder should have sub-directories bin, lib, include & src.