nixpkgs/nixos/modules/services/desktops/flatpak.md
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Flatpak

Source: {file}modules/services/desktop/flatpak.nix

Upstream documentation: https://github.com/flatpak/flatpak/wiki

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.

To enable Flatpak, add the following to your {file}configuration.nix:

{
  services.flatpak.enable = true;
}

For the sandboxed apps to work correctly, desktop integration portals need to be installed. If you run GNOME, this will be handled automatically for you; in other cases, you will need to add something like the following to your {file}configuration.nix:

{
  xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
  xdg.portal.config.common.default = "gtk";
}

Then, you will need to add a repository, for example, Flathub, either using the following commands:

$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
$ flatpak update

or by opening the repository file in GNOME Software.

Finally, you can search and install programs:

$ flatpak search bustle
$ flatpak install flathub org.freedesktop.Bustle
$ flatpak run org.freedesktop.Bustle

Again, GNOME Software offers graphical interface for these tasks.