{

  description = "My various NixOs configurations";

  inputs = {
    nixpkgs.url = "github:NixOs/nixpkgs/nixos-23.05";
    home-manager.url = "github:nix-community/home-manager/release-23.05";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, home-manager }: {

    nixosConfigurations.lambda = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        {
          nix.registry.nixpkgs.flake = nixpkgs;
          system.configurationRevision = nixpkgs.lib.mkIf (self ? rev) self.rev;
        }
        ./lambda/configuration.nix
        home-manager.nixosModules.home-manager
        {
          home-manager = {
            useGlobalPkgs = true;
            useUserPackages = true;
            users.rachel = import ./home/rachel.nix;
          };
        }
      ];
    };

    nixosConfigurations.computational = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        {
          nix.registry.nixpkgs.flake = nixpkgs;
          system.configurationRevision = nixpkgs.lib.mkIf (self ? rev) self.rev;
        }
        ./computational/configuration.nix
        home-manager.nixosModules.home-manager
        {
          home-manager = {
            useGlobalPkgs = true;
            useUserPackages = true;
            users.rachel = import ./home/rachel.nix;
          };
        }
      ];
    };

  };
}