Environment: MSYS_BITS=64, SCRIPT=python x.py dist, RUST_CONFIGURE_ARGS=--build=x86_64-pc-windows-gnu --enable-extended, MINGW_URL=https://s3.amazonaws.com/rust-lang-ci, MINGW_ARCHIVE=x86_64-4.9.2-release-win32-seh-rt_v4-rev4.7z, MINGW_DIR=mingw64, DEPLOY=1