Initial NixOS flake-based multi-host setup

Add a NixOS system configuration using flakes, supporting multiple hosts (desktop, laptop, my-machine) with shared and per-host settings. Includes Home Manager integration, user-level and system-level package management, and example hardware configuration placeholders. Provides a README with setup instructions and a .gitignore for common Nix and editor artifacts.

.gitignore

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+# Nix build results
+result
+result-*
+
+# Temporary files
+*~
+*.swp
+*.swo
+.DS_Store
+
+# Hardware configuration (may contain sensitive info)
+# Uncomment if you don't want to commit hardware configs
+# hosts/*/hardware-configuration.nix

README.md

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+# NixOS System Configuration
+
+This is a NixOS flake configuration for managing your system setup, ricing, and applications across multiple devices.
+
+## Structure
+
+```
+.
+├── flake.nix                    # Main flake configuration
+├── flake.lock                   # Locked dependency versions
+├── system/
+│   └── common.nix               # Shared system configuration
+├── hosts/
+│   └── my-machine/              # Per-machine configurations
+│       ├── configuration.nix    # Machine-specific settings
+│       └── hardware-configuration.nix  # Hardware-specific settings
+└── home/
+    └── home.nix                 # User-level configuration (dotfiles, packages)
+```
+
+## Initial Setup
+
+1. **Generate hardware configuration** on your NixOS machine:
+   ```bash
+   nixos-generate-config --show-hardware-config > hardware-configuration.nix
+   ```
+   Copy the output to `hosts/my-machine/hardware-configuration.nix`
+
+2. **Update configuration files**:
+   - Change `my-machine` to your actual hostname throughout the files
+   - Update `yourusername` to your actual username
+   - Adjust timezone, locale, and other personal settings
+   - Choose your desktop environment / window manager
+
+3. **Update flake inputs**:
+   ```bash
+   nix flake update
+   ```
+
+4. **Build and switch to the new configuration**:
+   ```bash
+   sudo nixos-rebuild switch --flake .#my-machine
+   ```
+
+## Adding a New Machine
+
+1. Create a new directory under `hosts/` with your machine's hostname
+2. Generate and add the hardware configuration
+3. Create a `configuration.nix` for machine-specific settings
+4. Add the new machine to `flake.nix` under `nixosConfigurations`
+5. Build with: `sudo nixos-rebuild switch --flake .#new-machine`
+
+## Updating the System
+
+```bash
+# Update flake inputs
+nix flake update
+
+# Rebuild system
+sudo nixos-rebuild switch --flake .#my-machine
+```
+
+## Customization Ideas
+
+- Add window manager configurations (i3, bspwm, Hyprland, etc.)
+- Configure terminal emulators (Alacritty, Kitty, WezTerm)
+- Set up status bars (Polybar, Waybar)
+- Add custom themes and color schemes
+- Configure rofi, dunst for notifications
+- Set up wallpaper management with nitrogen or variety
+
+## Resources
+
+- [NixOS Manual](https://nixos.org/manual/nixos/stable/)
+- [Home Manager Manual](https://nix-community.github.io/home-manager/)
+- [NixOS Wiki](https://nixos.wiki/)

flake.lock

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+{
+  "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1,
+        "narHash": "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "0000000000000000000000000000000000000000",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-25.05",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729618870,
+        "narHash": "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "879bd460b3d3bb3c4c67e863af2c3a7dbbebb87e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "NixOS system configuration flake with ricing and application management";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    
+    # Home Manager for user-level configuration and dotfiles
+    home-manager = {
+      url = "github:nix-community/home-manager/release-25.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    
+    # Optional: Hyprland (if you want a tiling Wayland compositor)
+    # hyprland.url = "github:hyprwm/Hyprland";
+    
+    # Optional: Other useful inputs
+    # nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs, home-manager, ... }@inputs: {
+    # NixOS configuration for your hostname(s)
+    nixosConfigurations = {
+      # Desktop PC configuration
+      desktop = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        specialArgs = { inherit inputs; };
+        modules = [
+          # Your hardware configuration
+          ./hosts/desktop/hardware-configuration.nix
+          
+          # System-wide configuration
+          ./hosts/desktop/configuration.nix
+          
+          # Common system configuration shared across all machines
+          ./system/common.nix
+          
+          # Home Manager NixOS module
+          home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+            
+            # Replace "yourusername" with your actual username
+            home-manager.users.yourusername = import ./home/home.nix;
+          }
+        ];
+      };
+      
+      # Laptop configuration
+      laptop = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        specialArgs = { inherit inputs; };
+        modules = [
+          # Your hardware configuration
+          ./hosts/laptop/hardware-configuration.nix
+          
+          # System-wide configuration
+          ./hosts/laptop/configuration.nix
+          
+          # Common system configuration shared across all machines
+          ./system/common.nix
+          
+          # Home Manager NixOS module
+          home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+            
+            # Replace "yourusername" with your actual username
+            home-manager.users.yourusername = import ./home/home.nix;
+          }
+        ];
+      };
+    };
+  };
+}

home/home.nix

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+{ config, pkgs, ... }:
+
+{
+  # Home Manager configuration for user-level dotfiles and applications
+  
+  home.username = "yourusername"; # Change this
+  home.homeDirectory = "/home/yourusername"; # Change this
+
+  # Packages to install for this user
+  home.packages = with pkgs; [
+    # Development tools
+    vscode
+    # neovim
+    
+    # Browsers
+    firefox
+    # chromium
+    
+    # Terminal emulators
+    # alacritty
+    # kitty
+    # wezterm
+    
+    # File managers
+    # thunar
+    # ranger
+    # nnn
+    
+    # Media
+    # mpv
+    # vlc
+    # spotify
+    
+    # Communication
+    # discord
+    # slack
+    
+    # Screenshots and screen recording
+    # flameshot
+    # maim
+    # obs-studio
+    
+    # System utilities
+    # rofi
+    # dunst
+    # polybar
+    # picom
+    
+    # Ricing essentials
+    # lxappearance
+    # nitrogen  # wallpaper setter
+    # pywal     # color scheme generator
+    
+    # Themes and icons
+    # papirus-icon-theme
+    # arc-theme
+  ];
+
+  # Git configuration
+  programs.git = {
+    enable = true;
+    userName = "Your Name";
+    userEmail = "your.email@example.com";
+  };
+
+  # Terminal configuration
+  programs.zsh = {
+    enable = true;
+    enableCompletion = true;
+    # autosuggestion.enable = true;
+    # syntaxHighlighting.enable = true;
+    
+    shellAliases = {
+      ll = "ls -la";
+      update = "sudo nixos-rebuild switch --flake .#my-machine";
+      # Add more aliases
+    };
+    
+    # oh-my-zsh = {
+    #   enable = true;
+    #   theme = "robbyrussell";
+    #   plugins = [ "git" "sudo" ];
+    # };
+  };
+
+  # Bash configuration (if you prefer bash)
+  programs.bash = {
+    enable = true;
+    shellAliases = {
+      ll = "ls -la";
+      update = "sudo nixos-rebuild switch --flake .#my-machine";
+    };
+  };
+
+  # Starship prompt
+  # programs.starship = {
+  #   enable = true;
+  #   settings = {
+  #     add_newline = false;
+  #   };
+  # };
+
+  # GTK theming
+  gtk = {
+    enable = true;
+    # theme = {
+    #   name = "Arc-Dark";
+    #   package = pkgs.arc-theme;
+    # };
+    # iconTheme = {
+    #   name = "Papirus-Dark";
+    #   package = pkgs.papirus-icon-theme;
+    # };
+  };
+
+  # Qt theming
+  # qt = {
+  #   enable = true;
+  #   platformTheme.name = "gtk";
+  # };
+
+  # Let Home Manager manage itself
+  programs.home-manager.enable = true;
+
+  # Home Manager state version
+  home.stateVersion = "25.05";
+}

hosts/desktop/configuration.nix

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+{ config, pkgs, ... }:
+
+{
+  # Desktop PC specific configuration
+  
+  networking.hostName = "desktop";
+
+  # Users configuration
+  users.users.yourusername = { # Change "yourusername" to your actual username
+    isNormalUser = true;
+    description = "Your Name"; # Change this
+    extraGroups = [ "networkmanager" "wheel" "video" "audio" ];
+    shell = pkgs.zsh; # or pkgs.bash
+  };
+
+  # Enable zsh system-wide
+  programs.zsh.enable = true;
+
+  # Display manager and desktop environment / window manager
+  services.xserver = {
+    enable = true;
+    
+    # Display manager
+    displayManager.gdm.enable = true;
+    
+    # Desktop environment (choose one, or comment all for a standalone WM)
+    # desktopManager.gnome.enable = true;
+    # desktopManager.plasma5.enable = true;
+    
+    # Window manager (uncomment if you want a standalone WM)
+    # windowManager.i3.enable = true;
+    # windowManager.bspwm.enable = true;
+  };
+
+  # Optional: Enable Wayland compositor
+  # programs.hyprland = {
+  #   enable = true;
+  #   xwayland.enable = true;
+  # };
+
+  # Desktop-specific packages (gaming, streaming, etc.)
+  environment.systemPackages = with pkgs; [
+    # Add desktop-specific packages here
+    # discord
+    # steam
+    # obs-studio
+  ];
+
+  # Gaming support (uncomment if needed)
+  # programs.steam.enable = true;
+  # programs.gamemode.enable = true;
+
+  # Fonts
+  fonts.packages = with pkgs; [
+    noto-fonts
+    noto-fonts-cjk-sans
+    noto-fonts-emoji
+    liberation_ttf
+    fira-code
+    fira-code-symbols
+    (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" "Iosevka" ]; })
+  ];
+}

hosts/desktop/hardware-configuration.nix

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+# This file should be generated by running:
+# nixos-generate-config --show-hardware-config > hardware-configuration.nix
+#
+# Run this command on your DESKTOP to get the correct hardware configuration
+# Then copy the output here.
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [ ];
+
+  # PLACEHOLDER: Replace this entire file with your actual hardware configuration
+  # You can generate it by running the command mentioned above on your NixOS system
+  
+  boot.initrd.availableKernelModules = [ ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+
+  # Swap configuration
+  # swapDevices = [ ];
+
+  # CPU microcode updates (uncomment for your CPU)
+  # hardware.cpu.intel.updateMicrocode = true;
+  # hardware.cpu.amd.updateMicrocode = true;
+
+  # NVIDIA drivers (uncomment if you have an NVIDIA GPU)
+  # services.xserver.videoDrivers = [ "nvidia" ];
+  # hardware.nvidia = {
+  #   modesetting.enable = true;
+  #   powerManagement.enable = false;
+  #   open = false;
+  #   nvidiaSettings = true;
+  # };
+}

hosts/laptop/configuration.nix

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+{ config, pkgs, ... }:
+
+{
+  # Laptop specific configuration
+  
+  networking.hostName = "laptop";
+
+  # Users configuration
+  users.users.yourusername = { # Change "yourusername" to your actual username
+    isNormalUser = true;
+    description = "Your Name"; # Change this
+    extraGroups = [ "networkmanager" "wheel" "video" "audio" ];
+    shell = pkgs.zsh; # or pkgs.bash
+  };
+
+  # Enable zsh system-wide
+  programs.zsh.enable = true;
+
+  # Display manager and desktop environment / window manager
+  services.xserver = {
+    enable = true;
+    
+    # Display manager
+    displayManager.gdm.enable = true;
+    
+    # Desktop environment (choose one, or comment all for a standalone WM)
+    # desktopManager.gnome.enable = true;
+    # desktopManager.plasma5.enable = true;
+    
+    # Window manager (uncomment if you want a standalone WM)
+    # windowManager.i3.enable = true;
+    # windowManager.bspwm.enable = true;
+  };
+
+  # Optional: Enable Wayland compositor
+  # programs.hyprland = {
+  #   enable = true;
+  #   xwayland.enable = true;
+  # };
+
+  # Laptop-specific power management
+  services.tlp = {
+    enable = true;
+    settings = {
+      # Battery thresholds (for supported laptops)
+      START_CHARGE_THRESH_BAT0 = 40;
+      STOP_CHARGE_THRESH_BAT0 = 80;
+      
+      # CPU scaling
+      CPU_SCALING_GOVERNOR_ON_AC = "performance";
+      CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
+    };
+  };
+
+  # Enable powertop for additional power savings
+  powerManagement.powertop.enable = true;
+
+  # Laptop-specific packages
+  environment.systemPackages = with pkgs; [
+    # Add laptop-specific packages here
+    brightnessctl  # Screen brightness control
+    acpi           # Battery info
+  ];
+
+  # Enable touchpad support
+  services.libinput = {
+    enable = true;
+    touchpad = {
+      naturalScrolling = true;
+      tapping = true;
+      disableWhileTyping = true;
+    };
+  };
+
+  # Fonts
+  fonts.packages = with pkgs; [
+    noto-fonts
+    noto-fonts-cjk-sans
+    noto-fonts-emoji
+    liberation_ttf
+    fira-code
+    fira-code-symbols
+    (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" "Iosevka" ]; })
+  ];
+}

hosts/laptop/hardware-configuration.nix

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+# This file should be generated by running:
+# nixos-generate-config --show-hardware-config > hardware-configuration.nix
+#
+# Run this command on your LAPTOP to get the correct hardware configuration
+# Then copy the output here.
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [ ];
+
+  # PLACEHOLDER: Replace this entire file with your actual hardware configuration
+  # You can generate it by running the command mentioned above on your NixOS system
+  
+  boot.initrd.availableKernelModules = [ ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+
+  # Swap configuration
+  # swapDevices = [ ];
+
+  # CPU microcode updates (uncomment for your CPU)
+  # hardware.cpu.intel.updateMicrocode = true;
+  # hardware.cpu.amd.updateMicrocode = true;
+
+  # Laptop power management
+  powerManagement.cpuFreqGovernor = "powersave";
+}

hosts/my-machine/configuration.nix

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+{ config, pkgs, ... }:
+
+{
+  # Machine-specific configuration
+  
+  networking.hostName = "my-machine"; # Change this to your hostname
+
+  # Users configuration
+  users.users.yourusername = { # Change "yourusername" to your actual username
+    isNormalUser = true;
+    description = "Your Name"; # Change this
+    extraGroups = [ "networkmanager" "wheel" "video" "audio" ];
+    shell = pkgs.zsh; # or pkgs.bash
+  };
+
+  # Enable zsh system-wide
+  programs.zsh.enable = true;
+
+  # Display manager and desktop environment / window manager
+  services.xserver = {
+    enable = true;
+    
+    # Display manager (choose one)
+    displayManager.gdm.enable = true;
+    # displayManager.sddm.enable = true;
+    # displayManager.lightdm.enable = true;
+    
+    # Desktop environment (choose one, or comment all for a standalone WM)
+    # desktopManager.gnome.enable = true;
+    # desktopManager.plasma5.enable = true;
+    # desktopManager.xfce.enable = true;
+    
+    # Window manager (uncomment if you want a standalone WM)
+    # windowManager.i3.enable = true;
+    # windowManager.bspwm.enable = true;
+  };
+
+  # Optional: Enable Wayland compositor
+  # programs.hyprland = {
+  #   enable = true;
+  #   xwayland.enable = true;
+  # };
+
+  # Fonts
+  fonts.packages = with pkgs; [
+    noto-fonts
+    noto-fonts-cjk-sans
+    noto-fonts-emoji
+    liberation_ttf
+    fira-code
+    fira-code-symbols
+    (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" "Iosevka" ]; })
+  ];
+}

hosts/my-machine/hardware-configuration.nix

@@ -0,0 +1,31 @@
+# This file should be generated by running:
+# nixos-generate-config --show-hardware-config > hardware-configuration.nix
+#
+# Run this command on your NixOS machine to get the correct hardware configuration
+# Then copy the output here.
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [ ];
+
+  # PLACEHOLDER: Replace this entire file with your actual hardware configuration
+  # You can generate it by running the command mentioned above on your NixOS system
+  
+  boot.initrd.availableKernelModules = [ ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+
+  # Swap configuration
+  # swapDevices = [ ];
+
+  # CPU microcode updates
+  # hardware.cpu.intel.updateMicrocode = true;
+  # hardware.cpu.amd.updateMicrocode = true;
+}

system/common.nix

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+{ config, pkgs, ... }:
+
+{
+  # Common system configuration shared across all machines
+  
+  # Bootloader
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Networking
+  networking.networkmanager.enable = true;
+
+  # Timezone and locale
+  time.timeZone = "Europe/London";
+  i18n.defaultLocale = "en_US.UTF-8";
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "en_US.UTF-8";
+    LC_IDENTIFICATION = "en_US.UTF-8";
+    LC_MEASUREMENT = "en_US.UTF-8";
+    LC_MONETARY = "en_US.UTF-8";
+    LC_NAME = "en_US.UTF-8";
+    LC_NUMERIC = "en_US.UTF-8";
+    LC_PAPER = "en_US.UTF-8";
+    LC_TELEPHONE = "en_US.UTF-8";
+    LC_TIME = "en_US.UTF-8";
+  };
+
+  # Enable sound
+  hardware.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    jack.enable = true;
+  };
+
+  # Enable CUPS for printing
+  services.printing.enable = true;
+
+  # Enable OpenGL
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true;
+  };
+
+  # System-wide packages
+  environment.systemPackages = with pkgs; [
+    vim
+    wget
+    curl
+    git
+    htop
+    neofetch
+    unzip
+    zip
+  ];
+
+  # Enable flakes
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # Enable networking
+  networking.firewall.enable = true;
+
+  # System state version
+  system.stateVersion = "25.05";
+}