NixBSD is described as 'Attempt to make a reproducible and declarable BSD, based on NixOS. Although theoretically much of this work could be copied to build other BSDs, all work thus far has been focused on building a FreeBSD distribution' and is a operating system in the os & utilities category. There are more than 25 alternatives to NixBSD for a variety of platforms, including Linux, BSD, Self-Hosted, Windows and Mac apps. The best NixBSD alternative is Linux Mint, which is both free and Open Source. Other great apps like NixBSD are Ubuntu, Debian, Fedora and Arch Linux.