{
  description = "The SchildiChat Matrix client";

  inputs.nixpkgs.url = github:NixOS/nixpkgs;

  outputs = { self, nixpkgs }: let
    systems = [ "x86_64-linux" "i686-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);

    overlay = import ./nix/overlay.nix;

    # Memoize nixpkgs for different platforms for efficiency.
    nixpkgsFor = forAllSystems (system:
      import nixpkgs {
        inherit system;
        overlays = [ overlay ];
      });
  in {
    inherit overlay;

    packages = builtins.mapAttrs (system: pkgs: {
      inherit (pkgs)
        schildichat-web
        schildichat-desktop
        schildichat-desktop-wayland
      ;
    }) nixpkgsFor;
  };
}