{
  description = "flake for matt-nixos";

  inputs = {
    # nixpgs
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";

    # nixpkgs-unstable-small
    nixpkgs-unstable-small.url = "github:NixOS/nixpkgs/nixos-unstable-small";
    
    # nixpgs
    nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-24.05";

    # Authentik
    authentik-nix.url = "github:nix-community/authentik-nix";

    # Chaotic-nix
    chaotic.url = "github:chaotic-cx/nyx/nyxpkgs-unstable";

    # Impermenance
    impermanence.url = "github:nix-community/impermanence";

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

    # Lanzaboote
    lanzaboote = {
      url = "github:nix-community/lanzaboote/v0.4.1";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };

    # Nix hardware
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";

    # Sops-nix
    sops-nix.url = "github:Mic92/sops-nix";

    #Apple
    nixos-apple-silicon.url = "github:tpwrules/nixos-apple-silicon";
    # nixos-apple-silicon.url = "github:mjallen18/nixos-apple-silicon";
    # nixos-apple-silicon.url = "git+file:///home/matt/nixos-apple-silicon";
    nix-darwin.url = "github:LnL7/nix-darwin";

    cosmic = {
      url = "github:lilyinstarlight/nixos-cosmic";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };

    git-hooks.url = "github:cachix/git-hooks.nix";
  };

  outputs =
    {
      self,
      nixpkgs-unstable,
      nixpkgs-unstable-small,
      nixpkgs-stable,
      chaotic,
      lanzaboote,
      impermanence,
      home-manager,
      nixos-hardware,
      nix-darwin,
      nixos-apple-silicon,
      cosmic,
      authentik-nix,
      sops-nix,
      git-hooks,
    }@inputs:
    let
      inherit (self) outputs;
      supportedSystems = [
        "x86_64-linux"
        "aarch64-linux"
        "aarch64-darwin"
      ];
      forAllSystems = nixpkgs-unstable.lib.genAttrs supportedSystems;
    in
    {
      overlays = import ./overlays { inherit inputs; };

      nixosConfigurations = {
        # Desktop
        "matt-nixos" = nixpkgs-unstable.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            inherit inputs outputs;
          };
          modules = [
            impermanence.nixosModules.impermanence
            lanzaboote.nixosModules.lanzaboote
            ./hosts/desktop/configuration.nix
            ./share/impermanence
            chaotic.nixosModules.default
            home-manager.nixosModules.home-manager
            {
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.users.matt = import ./hosts/desktop/home.nix;
              home-manager.backupFileExtension = "bakup";
            }

            nixos-hardware.nixosModules.common-cpu-amd
            nixos-hardware.nixosModules.common-gpu-amd
            nixos-hardware.nixosModules.common-hidpi
            nixos-hardware.nixosModules.common-pc

            sops-nix.nixosModules.sops

            cosmic.nixosModules.default
          ];
        };

        # NAS
        "jallen-nas" = nixpkgs-unstable.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            inherit inputs outputs;
          };
          modules = [
            impermanence.nixosModules.impermanence
            ./hosts/nas/configuration.nix
            ./hosts/nas/impermanence.nix
            home-manager.nixosModules.home-manager
            {
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.users.admin = import ./hosts/nas/home.nix;
              home-manager.backupFileExtension = "backup";
            }

            authentik-nix.nixosModules.default

            sops-nix.nixosModules.sops

            nixos-hardware.nixosModules.common-pc
            nixos-hardware.nixosModules.common-cpu-amd
            nixos-hardware.nixosModules.common-hidpi
            # nixos-hardware.nixosModules.common-gpu-nvidia
          ];
        };

        # mac nix
        "mac-nixos" = nixpkgs-unstable.lib.nixosSystem {
          system = "aarch64-linux";
          modules = [
            nixos-apple-silicon.nixosModules.apple-silicon-support
            ./hosts/mac-nixos/configuration.nix
            home-manager.nixosModules.home-manager
            {
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.users.matt = import ./hosts/mac-nixos/home.nix;
            }
          ];
        };

        # Pi4
        "pi4" = nixpkgs-unstable.lib.nixosSystem {
          system = "aarch64-linux";
          modules = [
            nixos-hardware.nixosModules.raspberry-pi-4
            ./hosts/pi4/configuration.nix

            home-manager.nixosModules.home-manager
            {
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.users.matt = import ./hosts/pi4/home.nix;
            }
          ];
        };
      };

      darwinConfigurations = {
        "MacBook-Pro" = nix-darwin.lib.darwinSystem {
          system = "aarch64-darwin";
          modules = [
            ./hosts/mac/configuration.nix
            home-manager.darwinModules.home-manager
            {
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.users.mattjallen = import ./hosts/mac/home.nix;
            }
          ];
        };
      };

      # Expose the package set, including overlays, for convenience.
      darwinPackages = self.darwinConfigurations."MacBook-Pro".pkgs;

      # Set Git commit hash for darwin-version.
      system.configurationRevision = self.rev or self.dirtyRev or null;
      
      # checks = forAllSystems (system: {
      #   pre-commit-check = git-hooks.lib.${system}.run {
      #     src = ./.;
      #     hooks = {
      #       nixpkgs-fmt.enable = true;
      #     };
      #   };
      # });

      # devShells = forAllSystems (system: {
      #   default = nixpkgs-unstable.legacyPackages.${system}.mkShell {
      #     inherit (self.checks.${system}.pre-commit-check) shellHook;
      #     buildInputs = self.checks.${system}.pre-commit-check.enabledPackages;
      #   };
      # });
    };
}