this post was submitted on 18 Jan 2024
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This is a big issue with Snap. It may be like Flatpak, allowing devs to set their own dependencies for ALL distros, but its poor uptake outside of Ubuntu's ecosystem means that it's no different to yet another distro repackaging system.
Flatpak, or even Nixpkgs, are the future because they allow devs to have control over the distribution of their software. Snap being such a closed ecosystem in comparison only means it will replicate many of the problems we've found with traditional (re)packaging systems.
I can't speak for Flatpak as I haven't tried it but nixpkgs are beautiful to work with and configuration of my system has become completely reproducible in a clean format.
As a dev, you can just distribute a nixpkg with whatever build tool inside. That beats the current system of "native" packages where your software is repacked and then maintained by half a dozen teams for different distros that use different dependencies and update cadences.
Bottles has gone as far as to demand its fedora package be removed and now shows a warning if you're not using the flatpak version because repackers just don't properly test all their software (how can they? there are thousands of apps in these repos!)
Yeah there are some issues with compatibility, I've found a couple of apps that error on my Mac.
How does it compare to Flatpak?
nix is a "native" packaging format. Apps are compiled for your host OS and run in that environment with no restrictions, for better or worse.
Flatpaks are containers. They provide a virtual OS to the application such as the file system, and accessing host OS features is done through "portals" which just means you can give/revoke the ability of the app to access your host OS resources such as networking, file access etc.
Flatpaks are therefore much safer in theory. But Nix packages are lower overhead, and can interact like any built-in software binary that you'd have when you spin up a fresh install of, say, debian.
Nix packages are harder to use IMO thanks to their poor documentation and lack of GUI package manager support (not that it's impossible, just that it's been a niche system for most of its life) and since most people are accustomed to flatpaks and their permissions system (and the fact it comes preinstalled on most distros) so flatpak is still pretty ubiquitous, even for NIxOS users