config/flake.nix

{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    { self
    , nixpkgs
    , home-manager
    , ...
    } @inputs:
    let
      overlays = [
        (import (builtins.fetchTarball {
          url = https://github.com/nix-community/emacs-overlay/archive/0fe268a3b03ab9ef7a77363c64247030ee3902a7.tar.gz;
          sha256 = "sha256:05cxwj5xnw9kci75pgzd3kff9k3548fsc0x8y0s08jzcidai139f";
        }))
      ];
    in {
      nixosConfigurations.falcon = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ({ config, pkgs, ... }: {
            nixpkgs.overlays = overlays;
          })
          ./hosts/falcon

          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.backupFileExtension = "bak";
          }
        ];
      };
      nixosConfigurations.eagle = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ({ config, pkgs, ... }: {
            nixpkgs.overlays = overlays;
          })
          ./hosts/eagle

          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.backupFileExtension = "bak";
          }
        ];
      };
    };
}