add nixos config

nixos/.gitignore

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+private-configuration.nix
+hardware-configuration.nix

nixos/configuration.nix

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+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ./hardware-configuration.nix
+      ./extra-hardware-configuration.nix
+      ./private-configuration.nix
+    ];
+
+  # Bootloader.
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Setup keyfile
+  boot.initrd.secrets = {
+    "/crypto_keyfile.bin" = null;
+  };
+
+  networking.hostName = "nixos"; # Define your hostname.
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Enable networking
+  networking.networkmanager.enable = true;
+
+  # Set your time zone.
+  time.timeZone = "Europe/Madrid";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ALL = "en_US.UTF-8";
+  };
+
+  # Configure keymap in X11
+  services.xserver = {
+    layout = "us";
+    xkbVariant = "";
+
+    enable=true;
+    displayManager = {
+      defaultSession = "none+i3";
+    };
+    windowManager.i3 = {
+      enable=true;
+      extraPackages = with pkgs; [
+        dmenu
+        i3status
+        i3lock
+      ];
+    };
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.userc = {
+    isNormalUser = true;
+    description = "userc";
+    extraGroups = [ "networkmanager" "wheel" ];
+    packages = with pkgs; [];
+  };
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+  	vim
+	neovim
+ 	wget
+	tmux
+	git
+	delta
+	mosh
+	bat
+	ripgrep
+	fzf
+	python3
+	xfce.thunar
+	screenfetch
+	htop
+	alacritty
+	firefox
+	qutebrowser
+  ];
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+  # programs.mtr.enable = true;
+  # programs.gnupg.agent = {
+  #   enable = true;
+  #   enableSSHSupport = true;
+  # };
+  programs.zsh.enable = true;
+  users.defaultUserShell = pkgs.zsh;
+  environment.shells = with pkgs; [zsh];
+
+  # List services that you want to enable:
+
+  # Enable the OpenSSH daemon.
+  # services.openssh.enable = true;
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "23.05"; # Did you read the comment?
+
+  # gvfs needed for Thunar to detect external disks
+  services.gvfs.enable = true;
+
+}

nixos/extra-hardware-configuration.nix

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+# This is a custom file for a chromebook.
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  services.logind.extraConfig = ''
+    # disable power button. This is for the chromebook
+    HandlePowerKey=ignore
+  '';
+
+  # Set an usable key configuration: Ctrl at capslock, Win at Alt, Alt at Ctrl
+  services.xserver.displayManager.sessionCommands =''
+    ${pkgs.xorg.xmodmap}/bin/xmodmap "${pkgs.writeText  "xkb-layout" ''
+      !
+      ! Swap Caps_Lock and Control_L
+      !
+      
+      remove control = Control_L
+      remove mod1 = Alt_L
+      remove mod4 = Super_L
+      
+      keysym Control_L = Alt_L
+      keysym Super_L = Control_L
+      keysym Alt_L = Super_L
+      
+      add control = Control_L
+      add mod1 = Alt_L
+      add mod4 = Super_L
+    ''}"
+  '';
+}