PXpxc·Dec 19, 2021
Wow! I can't believe I've never noticed that. For many years, the only graphical installation disk was based on Plasma, and I think it also had that tag. NixOS only started shipping a GNOME iso for installation purposes a little over a year ago (for 20.09), and I kinda never noticed.
Looks like the main reason GNOME is recommended for installation media at the moment is that it does a better job of autodetecting HiDPI displays, and then scaling appropriately: https://github.com/NixOS/nixos-homepage/pull/643
There are also some packaging issues for Qt with NixOS, because Qt plugins fundamentally rely on ‘impurity’ at runtime, and the Qt framework makes promises it doesn't keep about binary compatibility.
Here are some of the relevant issues for historical context and some of the tradeoffs Nixpkgs developers have faced when it comes to hand
Read the rest
ling Qt and KDE packaging:
https://github.com/NixOS/nixpkgs/issues/86369
https://github.com/NixOS/nixpkgs/pull/54525
https://github.com/NixOS/nixpkgs/pull/44047
I realize that may not be a fully satisfying answer as to why the GNOME-based installation graphical ISO is recommended over the Qt one because one can imagine that the Qt packaging issue should be resolved some other way, or see the difficulty of packaging Qt plugins and applications in Nixpkgs as fundamentally a Nix defect. But I hope it makes that decision make more sense.
FWIW, afaict Plasma is the more popular of the two major DEs on NixOS, and it's what I've always used on NixOS myself, including now. It is definitely usable.