> For reasons of security, this user does not have root privileges, and therefore cannot install packages using a traditional package manager like APT.<p>Okay, I'm going to nitpick: Termux proves this isn't a requirement of apt, just most distros using it, and in any event fakeroot/proot would solve it if that was the goal. Of course, nix is a mostly good system with loads of other benefits; it's only that specific reason that feels weak.