{
    config,
    pkgs,
    lib,
    inputs,
    config',
    ...
}: {
    nixpkgs = {
        config = {
            permittedInsecurePackages = [
                "python-2.7.18.6"
            ];
            allowUnfree = true;
        };
        overlays = [
            inputs.nur.overlay
            inputs.neovim-nightly-overlay.overlay
        ];
    };

    boot = {
        loader = {
            systemd-boot = {
                enable = true;
                memtest86.enable = true;
            };
            efi.canTouchEfiVariables = true;
        };
        #kernelPackages = pkgs.linuxPackages_xanmod_latest;
        kernelPackages = pkgs.linuxPackages_zen;
        extraModulePackages = with config.boot.kernelPackages; [
            (
                ddcci-driver.overrideAttrs (o: {
                    #patches = (o.patches or [ ]) ++ [
                    #    ./ddcci_semaphore_fix.patch
                    #];
                })
            )
        ];
        kernelModules = [ "ddcci" ];
        initrd.kernelModules = [ "amdgpu" ];
        kernelParams = [
            "video=eDP-1:2560x1440@165"
            "video=HDMI-A-1:2560x1440@144"
        ];
    };

    documentation = {
        enable = true;
        dev.enable = true;
        doc.enable = true;
        info.enable = true;
        man = {
            enable = true;
            generateCaches = true;
            man-db.enable = false;
            mandoc.enable = true;
        };
        nixos = {
            includeAllModules = true;
        };
    };

    networking = {
        hostName = config'.hostname;
        networkmanager.enable = true;
        firewall.checkReversePath = "loose";
    };

    # don't wait for network to boot faster
    # https://old.reddit.com/r/NixOS/comments/vdz86j/how_to_remove_boot_dependency_on_network_for_a
    systemd = {
        targets.network-online.wantedBy = lib.mkForce []; # default is [ "multi-user.target" ]
        services.NetworkManager-wait-online.wantedBy = lib.mkForce []; # default is [ "network-online.target" ]
    };

    systemd.oomd = {
        enable = true;
        enableUserServices = true;
    };

    time.timeZone = "Europe/Warsaw";

    nix = {
        settings = {
            experimental-features = [
                "flakes"
                "nix-command"
            ];
            substituters = [
                "https://hyprland.cachix.org"
                "https://nix-gaming.cachix.org"
                "https://anyrun.cachix.org"
                "https://nix-community.cachix.org"
                "https://nixpkgs-wayland.cachix.org"
                "https://helix.cachix.org"
                "https://viperml.cachix.org"
            ];
            trusted-public-keys = [
                "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
                "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
                "anyrun.cachix.org-1:pqBobmOjI7nKlsUMV25u9QHa9btJK65/C8vnO3p346s="
                "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
                "nixpkgs-wayland.cachix.org-1:3lwxaILxMRkVhehr5StQprHdEo4IrE8sRho9R9HOLYA="
                "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
                "viperml.cachix.org-1:qZhKBMTfmcLL+OG6fj/hzsMEedgKvZVFRRAhq7j8Vh8="
            ];
            keep-outputs = true;
            keep-derivations = true;
        };
    };

    virtualisation = {
        libvirtd = {
            enable = true;
            onBoot = "ignore";
            qemu = {
                ovmf.enable = true;
                runAsRoot = false;
                swtpm.enable = true;
            };
        };
    };

    networking.firewall.trustedInterfaces = [ "virbr0" ];

    programs.dconf.enable = true;

    # https://github.com/NixOS/nixpkgs/issues/158025
    security.pam.services = {
        swaylock.text = "auth include login";
        gtklock.text = "auth include login";
    };

    security.sudo.package = pkgs.sudo.override { withInsults = true; };

    security.polkit.enable = true;

    fonts.packages = with pkgs; [
        material-design-icons
        (nerdfonts.override { fonts = [
            "JetBrainsMono"
            "Iosevka"
        ]; })
        noto-fonts
        noto-fonts-cjk-sans
        noto-fonts-cjk-serif
        noto-fonts-emoji
    ];

    users.users.${config'.username} = {
        isNormalUser = true;
        extraGroups = [ "wheel" "networkmanager" "libvirtd" ];
        shell = pkgs.zsh;
    };

    programs.zsh.enable = true;

    environment = {
        shells = [ pkgs.zsh ];
        pathsToLink = [ "/share/zsh" ];
        enableAllTerminfo = true;
        sessionVariables = {
            TERM = "foot";
            EDITOR = "${pkgs.neovim}/bin/nvim";

            GTK_IM_MODULE = "fcitx";
            QT_IM_MODULE = "fcitx";
            XMODIFIERS = "@im=fcitx";

            LIBSEAT_BACKEND = "logind";
            QT_QPA_PLATFORMTHEME = "qt5ct";

            GOPATH = "\$HOME/.local/share/go";

            XDG_CURRENT_DESKTOP = "Hyprland";
            XDG_SESSION_TYPE = "wayland";
            XDG_SESSION_DESKTOP = "Hyprland";

            QT_QPA_PLATFORM = "wayland";
            MOZ_ENABLE_WAYLAND = "1";
            MOZ_DRM_DEVICE = "/dev/dri/card0";

            SDL_VIDEODRIVER = "wayland";

            _JAVA_AWT_WM_NONEREPARENTING = "1";
            
            CLUTTER_BACKEND = "wayland";
            
            GDK_BACKEND = "wayland";
            
            XCURSOR_THEME = "Bibata-Modern-Classic";
            XCURSOR_SIZE = "24";

            XDG_DATA_HOME = "\$HOME/.local/share";
            XDG_CONFIG_HOME = "\$HOME/.config";
            XDG_STATE_HOME = "\$HOME/.local/state";
            XDG_CACHE_HOME = "\$HOME/.cache";

            HISTFILE = "\${XDG_STATE_HOME}/bash/history";
            CARGO_HOME = "\${XDG_DATA_HOME}/cargo";
            GTK2_RC_FILES = "\${XDG_CONFIG_HOME}/gtk-2.0/gtkrc";

            CHROME_EXECUTABLE = "${pkgs.ungoogled-chromium}/bin/chromium";

            NIXOS_OZONE_WL = "1";
        };
        systemPackages = with pkgs; [
            man-pages
            man-pages-posix
        ];
    };

    services = {
        blueman.enable = true;
        mullvad-vpn.enable = true;

        pcscd.enable = true;

        udev.packages = [ pkgs.yubikey-personalization ];

        udisks2.enable = true;
        dbus.enable = true;
    };

    programs.gnupg.agent = {
        enable = true;
        pinentryFlavor = "qt";
        enableSSHSupport = true;
    };

    hardware = {
        opentabletdriver = {
            enable = true;
            daemon.enable = true;
        };
        bluetooth.enable = true;
        opengl = {
            enable = true;
            driSupport = true;
            driSupport32Bit = true;
        };
    };

    xdg.portal = {
        enable = true;
        extraPortals = with pkgs; [
            inputs.hyprland.packages.${pkgs.system}.xdg-desktop-portal-hyprland
            xdg-desktop-portal-gtk
        ];
    };

    services.btrfs = {
        autoScrub = {
            enable = true;
            interval = "weekly";
        };
    };

    services.psd = {
        enable = true;
        resyncTimer = "30m";
    };

    services.journald = {
        extraConfig = ''
            SystemMaxUse=100M
        '';
    };

    system.stateVersion = "23.11";
}