Windows x64 compiling is not possible any more with the latest build.
Download.py asks for a x86_64 argument that can't be run because cross platform compiling is not supported on windows.
------------Log----------
[ 11/707] [2] c++ src/engine/shared/ringbuffer.cpp
usage: download.py [-h] [--arch {x86,x86_64}] [--conf {debug,release}]
TARGET [TARGET ...]
download.py: error: argument --arch: invalid choice: 'unknown' (choose from 'x86', 'x86_64')
bam: 'Download...