Win-bash is port of the gnu bash for microsoft windows nt based systems. it is independent from the cygwin library and any other non-standard dll and does not need any registry variables. win-bash. Win-bash is port of the gnu bash for microsoft windows nt based systems. it is independent from the cygwin library and any other non-standard dll…. You’ll then need to download the build 14316 released yesterday (april 6th 2016). it may take a little while to download, but it is on the way!