Cannot get it from Windows Platform

[JanusChoi]

Here's the error messages while installing:

Running scrypt-0.8.0\setup.py -q bdist_egg --dist-dir C:\Users\123\AppData\Local\Temp\easy_install-vkmb1bvq\scrypt-0.8.0\egg-dist-tmp-l5hx6anj scrypt.c scrypt-1.2.0/lib/crypto\crypto_scrypt.h(33): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory error: Setup script exited with error: command 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\cl.exe' failed with exit status 2

seems unistd.h is a header file for unix, so I could only install piston in Linux / Mac ?