{
  description = "nixos configs";

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

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

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

    nh = {
      url = "github:viperML/nh";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-gc-env.url = "github:Julow/nix-gc-env";

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

    agenix = {
      url = "github:ryantm/agenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

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

    hyprland-contrib = {
      url = "github:hyprwm/contrib";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    pppdotpm-site = {
      url = "git+ssh://gitea@git.ppp.pm:1122/alex/ppp.pm-site.git?ref=main";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    whib-backend = {
      url = "git+ssh://gitea@git.ppp.pm:1122/alex/whib.git?ref=master";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    { ... }@inputs:
    {
      nixosConfigurations = {
        pinwheel = inputs.nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            inherit inputs;
          };
          modules = [
            ./hosts/pinwheel/configuration.nix
            inputs.nixos-hardware.nixosModules.lenovo-thinkpad-x1-10th-gen
            ./hosts/pinwheel/home.nix
          ];
        };

        manatee = inputs.nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            inherit inputs;
          };
          modules = [
            ./hosts/manatee/configuration.nix
          ];
        };

        backwards = inputs.nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            inherit inputs;
          };
          modules = [
            ./hosts/backwards/configuration.nix
            ./hosts/backwards/home.nix
          ];
        };

        tadpole =
          let
            system = "x86_64-linux";
          in
          inputs.nixpkgs.lib.nixosSystem {
            inherit system;
            specialArgs = {
              inherit inputs;
            };
            modules = [
              ./hosts/tadpole/configuration.nix
              ./hosts/tadpole/home.nix
              inputs.whib-backend.nixosModules.${system}.default
            ];
          };

        test-vm =
          let
            system = "x86_64-linux";
          in
          inputs.nixpkgs.lib.nixosSystem {
            inherit system;
            specialArgs = {
              inherit inputs;
            };
            modules = [
              ./hosts/test-vm/configuration.nix
              inputs.whib-backend.nixosModules.${system}.default
            ];
          };
      };

      devShells =
        let
          system = "x86_64-linux";
          pkgs = inputs.nixpkgs.legacyPackages.${system};
        in
        {
          ${system}.default = pkgs.mkShell {
            packages = [ pkgs.nixfmt-rfc-style ];
          };
        };
    };
}