{
  description = "Home Manager configuration of julian";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.11";
    systems.url = "github:nix-systems/default-linux";
    nixos-hardware.url = "github:nixos/nixos-hardware";
    impermanence.url = "github:nix-community/impermanence";
    nix-colors.url = "github:misterio77/nix-colors";
    deploy-rs.url = "github:serokell/deploy-rs";

    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    sops-nix = {
      url = "github:Mic92/sops-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-gl = {
      url = "github:nix-community/nixgl";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    disko = {
      url = "github:nix-community/disko";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # Various flakes
    alacritty-theme = {
      url = "github:alacritty/alacritty-theme";
      flake = false;
    };
    yazi-flavors = {
      url = "github:yazi-rs/flavors";
      flake = false;
    };
    nixvim = {
      url = "github:nix-community/nixvim";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-matlab = {
      url = "gitlab:doronbehar/nix-matlab";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # My projects
    sheet-organizer = {
      url = "git+https://gitlab.julian-mutter.de/julian/sheet-organizer";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    music-reader = {
      url = "git+https://gitlab.julian-mutter.de/julian/music-reader";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    inputs:
    inputs.snowfall-lib.mkFlake {
      inherit inputs;
      # Must always be ./.
      src = ./.;

      # Add overlays for the `nixpkgs` channel.
      overlays = with inputs; [
        nix-matlab.overlay
        nix-topology.overlays.default
      ];

      snowfall = {
        # The root of the snowfall config
        root = ./.;
        # lib, package and overlay namespace
        namespace = "frajul"; # defaults to "internal"

        meta = {
          name = "Julian's dotfiles";
          title = "Julian's dotfiles";
        };
      };

      # The attribute set specified here will be passed directly to NixPkgs when
      # instantiating the package set.
      channels-config = {
        # Allow unfree packages.
        allowUnfree = true;
        nvidia.acceptLicense = true;

        # Allow certain insecure packages
        permittedInsecurePackages = [ "olm-3.2.16" ];
      };

      systems.modules.nixos = with inputs; [
        nix-topology.nixosModules.default
        sops-nix.nixosModules.sops
        disko.nixosModules.disko
      ];
      systems.hosts.pianonix.modules = with inputs; [ nixos-hardware.nixosModules.raspberry-pi-4 ];

      # topology =
      #   with inputs;
      #   let
      #     host = self.nixosConfigurations.${builtins.head (builtins.attrNames self.nixosConfigurations)};
      #   in
      #   import nix-topology {
      #     inherit (host) pkgs; # Only this package set must include nix-topology.overlays.default
      #     modules = [
      #       (import ./topology { inherit (host) config; })
      #       { inherit (self) nixosConfigurations; }
      #     ];
      #   };
    }
    // {
      # deploy-rs node configuration
      deploy.nodes.pianonix = {
        hostname = "pianonix.local";
        profiles.system = {
          sshUser = "root";
          user = "root";
          path = inputs.deploy-rs.lib.aarch64-linux.activate.nixos inputs.self.nixosConfigurations.pianonix;
          confirmTimeout = 90; # default: 30s; raspberrypi takes a little longer restarting services
        };
      };

      deploy.nodes.builder = {
        hostname = "builder.julian-mutter.de";
        profiles.system = {
          sshUser = "root";
          user = "root";
          path = inputs.deploy-rs.lib.x86_64-linux.activate.nixos inputs.self.nixosConfigurations.builder;
          remoteBuild = true;
        };
      };
    };
}