{
  description = "A very basic flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    nixos-wsl.url = "github:nix-community/NixOS-WSL/main";
    mac-app-util.url = "github:hraban/mac-app-util";

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

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

    nix-vscode-extensions = {
      url = "github:nix-community/nix-vscode-extensions";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    firefox-addons = {
      url = "gitlab:rycee/nur-expressions?dir=pkgs/firefox-addons";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    
  };

  outputs = { self, darwin, nixpkgs, nixos-hardware, nixos-wsl, home-manager, mac-app-util, ... }@inputs: 
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs {
        inherit system;
        config = {
          allowUnfree = true;
        };
      };
    in {
      # Framework - argon
      nixosConfigurations.argon = nixpkgs.lib.nixosSystem {

        specialArgs = { inherit system; inherit inputs; };
        
        modules = [
          nixos-hardware.nixosModules.framework-12th-gen-intel
          ./_hosts/argon/configuration.nix
          ./nixos-modules
        ];
      };

      nixosConfigurations.bromine = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit system; inherit inputs; };
        
        modules = [
          nixos-hardware.nixosModules.framework-11th-gen-intel
          ./_hosts/bromine/configuration.nix
          ./nixos-modules
        ];
      };

      nixosConfigurations.caesium = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit system; inherit inputs; };
        
        modules = [
          nixos-hardware.nixosModules.framework-11th-gen-intel
          ./_hosts/caesium/configuration.nix
          ./nixos-modules
        ];
      };

      nixosConfigurations.caesium-wsl = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit system; inherit inputs; };
        
        modules = [
          nixos-wsl.nixosModules.default
          ./_hosts/caesium-wsl/configuration.nix
        ];
      };

      darwinConfigurations.cleo-darwin = darwin.lib.darwinSystem {
        specialArgs = { inherit system; inherit inputs; };
        system = "aarch64-darwin";
        modules = [
          ./cleo.darwin.nix
          mac-app-util.darwinModules.default
          home-manager.darwinModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.extraSpecialArgs = { inherit inputs; };
            home-manager.users."matthew.bessette" = import ./cleo.home.nix;
            home-manager.backupFileExtension = ".before-nix";
          }
        ];
      };

      darwinConfigurations.hydrogen = darwin.lib.darwinSystem {
        specialArgs = { inherit system; inherit inputs; };
        system = "aarch64-darwin";
        modules = [
          ./hydrogen.darwin.nix
          mac-app-util.darwinModules.default
          home-manager.darwinModules.home-manager
          # home-manager.sharedModules = [
          #   mac-app-util.homeManagerModules.default
          # ]
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.extraSpecialArgs = { inherit inputs; };
            home-manager.users."mbessette" = import ./hydrogen.home.nix;
            home-manager.backupFileExtension = ".before-nix";
          }
        ];
      };

      homeManagerModules.default = "./nixos-modules/home-manager";
    };
}