{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixos-wsl.url = "github:nix-community/NixOS-WSL";
    nixos-wsl.inputs.nixpkgs.follows = "nixpkgs";
    perimeter81.url = "git+file:///home/tvb/projects/perimeter81-nixos";
    perimeter81.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, nixos-wsl, perimeter81 }: {
    nixosConfigurations = {
      catacomb = nixpkgs.lib.nixosSystem {
        system = "aarch64-linux";
        modules = [ ./machine/catacomb ];
      };
      empyrean = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [ ./machine/empyrean ];
      };
      stagirite = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          nixos-wsl.nixosModules.wsl
          ./machine/stagirite
        ];
      };
      workeric = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./machine/workeric
          perimeter81.nixosModules.default
        ];
      };
    };
  };
}