{
  description = "nipsy's NixOS configurations";

  inputs = {

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

    #ghostty = {
    #  url = "github:ghostty-org/ghostty";
    #};

    home-manager-stable = {
      url = "github:nix-community/home-manager/release-24.05";
      inputs.nixpkgs.follows = "nixpkgs-stable";
    };

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

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

    # per https://nixos-and-flakes.thiscute.world/nixos-with-flakes/downgrade-or-upgrade-packages
    #nixpkgs-67e692392.url = "github:nixos/nixpkgs/67e69239226f37168d1adb8d29bd61150756a03e";
    #nixpkgs-wine9_22.url = "github:nixos/nixpkgs/dea5930f0ed8c29d3758d5ade9898b4e99d80b74";
    nixpkgs-master.url = "github:nixos/nixpkgs";
    #nixpkgs-pr369712.url = "github:7c6f434c/nixpkgs/fix-tftp-hpa";
    nixpkgs-stable.url = "github:nixos/nixpkgs/release-24.05";
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

    nvidia-patch = {
      url = "github:icewind1991/nvidia-patch-nixos";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    sops-nix = {
      url = "github:Mic92/sops-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

  };

  outputs = {
    disko,
    home-manager-stable,
    home-manager,
    nixos-hardware,
    nixpkgs-master,
    #nixpkgs-pr369712,
    nixpkgs-stable,
    #nixpkgs-wine9_22,
    nixpkgs,
    nvidia-patch,
    self,
    sops-nix,
    ...
  } @ inputs: let
    inherit (self) outputs;
    systems = [
      #"aarch64-linux"
      #"i686-linux"
      "x86_64-linux"
      #"aarch64-darwin"
      #"x86_64-darwin"
    ];
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {

    nixosConfigurations = {

      arrakis = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit inputs outputs; };
        modules = [
          #{
          #  environment.systemPackages = [
          #    ghostty.packages.x86_64-linux.default
          #  ];
          #}
          #({ config, pkgs, ... }:
          #  let
          #    overlay-dict-pr367392 = final: prev: {
          #      dict = nixpkgs-pr367392.legacyPackages."x86_64-linux".dict;
          #    };
          #  in {
          #    nixpkgs.overlays = [ overlay-dict-pr367392 ];
          #  }
          #)
          disko.nixosModules.disko
          ./hosts/arrakis
          home-manager.nixosModules.home-manager {
            home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/arrakis.nix;
            home-manager.users.nipsy = import ./home/nipsy/arrakis.nix;
          }
          sops-nix.nixosModules.sops
        ];
      };

      darkstar = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/darkstar
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/darkstar.nix;
            home-manager.users.nipsy = import ./home/nipsy/darkstar.nix;
          }
          sops-nix.nixosModules.sops
        ];
      };

      fangorn = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/fangorn
          home-manager.nixosModules.home-manager {
            home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/fangorn.nix;
            home-manager.users.don = import ./home/don/fangorn.nix;
            home-manager.users.nipsy = import ./home/nipsy/fangorn.nix;
          }
          sops-nix.nixosModules.sops
        ];
      };

      ginaz = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/ginaz
          home-manager.nixosModules.home-manager {
            home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/ginaz.nix;
            home-manager.users.nipsy = import ./home/nipsy/ginaz.nix;
          }
          nixos-hardware.nixosModules.lenovo-yoga-7-14ARH7-amdgpu
          sops-nix.nixosModules.sops
        ];
      };

      # from https://nixos.wiki/wiki/Creating_a_NixOS_live_CD and https://chengeric.com/homelab/
      iso = nixpkgs.lib.nixosSystem {
        modules = [
          ({ modulesPath, pkgs, ... }: {
            environment.systemPackages = [
              pkgs.acl
              pkgs.bash
              pkgs.bc
              pkgs.bzip2
              pkgs.conntrack-tools
              pkgs.coreutils
              pkgs.cpio
              pkgs.curl
              pkgs.diffutils
              pkgs.dig
              pkgs.dmidecode
              pkgs.elinks
              pkgs.encfs
              pkgs.ethtool
              pkgs.expect
              pkgs.file
              pkgs.findutils
              pkgs.fio
              pkgs.fping
              pkgs.git
              pkgs.gnugrep
              pkgs.gnupatch
              pkgs.gnused
              pkgs.gnutar
              pkgs.gptfdisk
              pkgs.gzip
              pkgs.htop
              pkgs.iotop
              pkgs.ipcalc
              pkgs.iperf
              pkgs.iproute2
              pkgs.iputils
              pkgs.jq
              pkgs.less
              pkgs.lshw
              pkgs.lsof
              pkgs.lvm2
              pkgs.moreutils
              pkgs.nano
              pkgs.netcat-openbsd
              pkgs.nettools
              pkgs.nmap
              pkgs.ntfs3g
              pkgs.openldap
              pkgs.openssl
              pkgs.p7zip
              pkgs.parted
              pkgs.pciutils
              pkgs.procps
              pkgs.progress
              pkgs.psmisc
              pkgs.pv
              pkgs.pwgen
              pkgs.recode
              pkgs.rsync
              pkgs.sg3_utils
              pkgs.smartmontools
              pkgs.socat
              pkgs.speedtest-cli
              pkgs.sqlite
              pkgs.sshfs
              pkgs.strace
              pkgs.sysstat
              pkgs.tcpdump
              pkgs.tftp-hpa
              pkgs.traceroute
              pkgs.tree
              pkgs.tshark
              pkgs.unixtools.xxd
              pkgs.unrar
              pkgs.unzip
              pkgs.usbutils
              pkgs.util-linux
              pkgs.vim
              pkgs.wdiff
              pkgs.wget
              pkgs.whois
              pkgs.wireguard-tools
              pkgs.xz
              pkgs.zip
            ];

            imports = [ (modulesPath + "/installer/cd-dvd/installation-cd-minimal.nix") ];

            #isoImage.squashfsCompression = "gzip -Xcompression-level 1";

            nix.settings.experimental-features = [ "nix-command" "flakes" ];

            nixpkgs.config.allowUnfree = true;

            services.openssh = {
              enable = true;
              openFirewall = true;

              settings = {
                PasswordAuthentication = false;
                KbdInteractiveAuthentication = false;
              };
            };

            users.users = {
              nixos.openssh.authorizedKeys.keys = [ (builtins.readFile ./hosts/common/users/nipsy/keys/id_arrakis.pub) ];
              root.openssh.authorizedKeys.keys = [ (builtins.readFile ./hosts/common/users/nipsy/keys/id_arrakis.pub) ];
            };
          })
        ];
        system = "x86_64-linux";
      };

      kaitain = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/kaitain
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/kaitain.nix;
            home-manager.users.nipsy = import ./home/nipsy/kaitain.nix;
          }
          sops-nix.nixosModules.sops
        ];
      };

      jupiter = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/jupiter
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/jupiter.nix;
            home-manager.users.nipsy = import ./home/nipsy/jupiter.nix;
          }
          #sops-nix.nixosModules.sops
        ];
      };

      neptune = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/neptune
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/neptune.nix;
            home-manager.users.nipsy = import ./home/nipsy/neptune.nix;
          }
          #sops-nix.nixosModules.sops
        ];
      };

      netboot = nixpkgs.lib.nixosSystem {
        modules = [
          "${nixpkgs}/nixos/modules/installer/netboot/netboot-minimal.nix"
          ({
            #isoImage.squashfsCompression = "gzip -Xcompression-level 1";
            nix.settings.experimental-features = [ "nix-command" "flakes" ];
            users.users = {
              nixos.openssh.authorizedKeys.keys = [ (builtins.readFile ./hosts/common/users/nipsy/keys/id_arrakis.pub) ];
              root.openssh.authorizedKeys.keys = [ (builtins.readFile ./hosts/common/users/nipsy/keys/id_arrakis.pub) ];
            };
          })
        ];
        system = "x86_64-linux";
      };

      richese = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/richese
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/richese.nix;
            home-manager.users.nipsy = import ./home/nipsy/richese.nix;
          }
          sops-nix.nixosModules.sops
        ];
      };

      saturn = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/saturn
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/saturn.nix;
            home-manager.users.nipsy = import ./home/nipsy/saturn.nix;
          }
          #sops-nix.nixosModules.sops
        ];
      };

      uranus = nixpkgs.lib.nixosSystem rec {
        specialArgs = { inherit inputs outputs; };
        modules = [
          disko.nixosModules.disko
          ./hosts/uranus
          home-manager.nixosModules.home-manager {
            #home-manager.sharedModules = [ sops-nix.homeManagerModules.sops ];
            home-manager.users.root = import ./home/root/uranus.nix;
            home-manager.users.nipsy = import ./home/nipsy/uranus.nix;
          }
          #sops-nix.nixosModules.sops
        ];
      };

    };

    overlays = import ./overlays {inherit inputs;};
    packages = forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});

  };

}