It was basically just a `environment.systemPackages` synonym, only GNOME used it, and it was stretching the responsibilities of the flatpak module too far. It also makes it cleaner to avoid installing the program using GNOME module’s `excludePackages` option. Partially reverts: https://github.com/NixOS/nixpkgs/pull/101516 Fixes: https://github.com/NixOS/nixpkgs/issues/110310
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.