{
  description = "personal NixOS configurations";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";

    home-manager = {
      url = "github:nix-community/home-manager/release-24.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    darwin = {
      url = "github:lnl7/nix-darwin";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    treefmt-nix = {
      url = "github:numtide/treefmt-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  # Output config, or config for NixOS system
  outputs = { nixpkgs, darwin, ... }@inputs:
    let mkSystem = import ./nix/lib/mkSystem.nix { inherit nixpkgs inputs; };
    in {
      nixosConfigurations.vm-aarch64 = mkSystem "vm-aarch64" {
        system = "aarch64-linux";
        user = "fcuny";
      };

      nixosConfigurations.vm-synology = mkSystem "vm-synology" {
        system = "x86_64-linux";
        user = "fcuny";
      };

      darwinConfigurations.macbook-air-m2 = mkSystem "macbook-air-m2" {
        system = "aarch64-darwin";
        user = "fcuny";
        darwin = true;
      };

      darwinConfigurations.macbook-pro-intel = mkSystem "macbook-pro-intel" {
        system = "x86_64-darwin";
        user = "fcuny";
        darwin = true;
      };
    };
}