{
  description = "tacocat's nix configuration";

  nixConfig = {
    experimental-features = ["nix-command" "flakes"];
    extra-substituters = [
      # Nix community's cache server
      "https://nix-community.cachix.org"
      "https://helix.cachix.org"
    ];
    extra-trusted-public-keys = [
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
    ];
  };

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    helix = {
      url = "github:helix-editor/helix/master";
      # inputs.nixpkgs.follows = "nixpkgs";
    };
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nixos-hardware.url = "github:NixOs/nixos-hardware/master";
    nur.url = "github:nix-community/nur";
    sops-nix.url = "github:Mic92/sops-nix";
  };

  # pass in the urls defined above
  # the @ syntax stores the arguments in the inputs variable
  outputs = {
    self,
    nixpkgs,
    home-manager,
    helix,
    nixos-hardware,
    nur,
    sops-nix,
    ...
  } @ inputs: let
    system = "x86_64-linux";
    pkgs = inputs.nixpkgs.legacyPackages.${system};
    overlays = [
      nur.overlay
    ];
  in {
    formatter.${system} = pkgs.alejandra;

    # nixosConfigurations: define options for different systems
    # desktop
    nixosConfigurations."BICEP" = nixpkgs.lib.nixosSystem {
      inherit system;
      modules = [
        ./hosts/BICEP/configuration.nix
        home-manager.nixosModules.home-manager
        {
          home-manager.useGlobalPkgs = true;
          home-manager.users."tacocat" = ./users/tacocat/home.nix;
        }
      ];
    };

    # laptop
    nixosConfigurations."JWST" = nixpkgs.lib.nixosSystem {
      inherit system;
      specialArgs = {inherit inputs;};
      modules = [
        ./hosts/JWST/configuration.nix
        sops-nix.nixosModules.sops
        # nixos-hardware.nixosModules.dell-xps-15-9520
        nixos-hardware.nixosModules.common-gpu-nvidia-disable
        {nixpkgs.overlays = overlays;}
        home-manager.nixosModules.home-manager
        {
          home-manager.useGlobalPkgs = true;
          home-manager.users."tacocat" = {
            imports = [./users/tacocat/home.nix];
            _module.args.theme = import ./modules/themes;
          };
          home-manager.extraSpecialArgs = {inherit inputs;};
        }
      ];
    };

    #homeConfigurations: define options for different users
    # homeConfigurations."tacocat" = inputs.home-manager.lib.homeManagerConfiguration {
    #   inherit pkgs;
    #   extraSpecialArgs = {inherit inputs;}; # Pass flake inputs to our config
    #   modules = [
    #     {nixpkgs.overlays = overlays;}
    #     ./users/tacocat/home.nix
    #   ];
    # };

    # packages.${system}."tacocat" = self.homeConfigurations."tacocat".activationPackage;
  };
}