Follow these simple steps to start using Flatpak
To install Flatpak, set NixOS option services.flatpak.enable to true
by putting the following into your /etc/nixos/configuration.nix:
services.flatpak.enable = true;
Then, rebuild and switch to the new configuration with:
$ sudo nixos-rebuild switch
For more details see the NixOS documentation.
$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
$ flatpak remote-add --if-not-exists ramatak https://download.ramatak.com/ramatak.flatpakrepo
To complete setup, return to the download page, and follow the instructions.!