Nix provides several advantages over other package managers like pacman for Arch Linux. Nix offers atomic upgrades and rollbacks, side-by-side installation of multiple versions of a package, multi-user support, per-user profiles, and improved conflict resolution. Additionally, Nix has powerful user environment management, which makes it easy to work with multiple profiles. While pacman is known for being fast and minimalistic, Nix's focus on reliability and reproducibility makes it a good choice for a lot of use cases.
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