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@ -5,7 +5,6 @@ My NixOS and home-manager flake
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## Structure
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- [`flake.nix`](./flake.nix): Starting point of the configuration, declaring entrypoints.
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- [`guides`](./guides/): Some simple documentation to help me (and maybe others) understand NixOS.
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- [`system`](./system/): Basic core configurations for the system itself.
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- [`options`](./options/): Declaration of the configurable options, that should be set by the individual machines.
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- [`hosts`](./hosts): Configuration of the individual hosts/computers
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@ -1,193 +0,0 @@
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# Installation
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This is a full NixOS installation guide, from live cd to a working OS.
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Once done, you will be left with a complete system, that uses my configuration.
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This installation will push to use flakes out of the box, configuration.nix will
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only be needed to add support for flakes and rebuild.
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## Live ISO
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This assumes you've chosen one of the ISO images with a graphical installer, and
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followed though with the installation, getting you to a basic NixOS installation.
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During this installation, make sure you allow non-free programs, and in the desktop environment selection, pick the option without any DE, we'll get to install that ourselves.
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## Set up configuration.nix
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Out of the box, NixOS only comes with `nano` editor, so we'll have to use that to edit the `configuration.nix` for the first time.
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```sh
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sudo nano configuration.nix
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```
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In there, change the `environment.systemPackages = with pkgs; [];` like, and include `git` and `vim`.
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After that, let's enable flakes, by adding the following anywhere in your `configuration.nix`:
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```nix
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nix.package = pkgs.nixUnstable;
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nix.settings.experimental-features = [ "nix-command" "flakes" ];
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```
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Now you can save the changes and rebuild the system:
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```sh
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sudo nixos-rebuild switch
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```
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## Set up flakes
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An interesting things about nix flakes, is that they need to live in a git
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repository, you won't be able to rebuild otherwise, so let's set up some git
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settings, so that we can make commits:
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```sh
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git config --global user.email "itsdrike@protonmail.com"
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git config --global user.name "ItsDrike"
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```
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We could create and manage this repository directly in `/etc/nixos`, however
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that's not practical, since we probably want to use our git config and
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generally just work in a non-root environment when editing the flake. I like
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using the `~/dots` directory.
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```sh
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cp -r /etc/nixos ~/dots
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cd ~/dots
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```
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Now we have 2 options, the first one I'll show will set up my configuration
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from this repository. Once done, you will have your system set up in the same
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way that I do. In the second option, I will go over a basic setup to create
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your own flake.
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## Create your own custom flake
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Initialize an empty git repository:
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```sh
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git init
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```
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Create a very basic `./flake.nix`:
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```sh
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{
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description = "ItsDrike's NixOS configuration";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
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};
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outputs = { self, nixpkgs, ...} @ inputs: {
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nixosConfigurations = {
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nixos = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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modules = [ ./configuration.nix ];
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};
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};
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};
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}
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```
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Let's add things to git!
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```sh
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git add flake.nix
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git add configuration.nix
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git add hardware-configuration.nix
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```
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Now you can rebuild the system to use our flake:
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```sh
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sudo nixos-rebuild switch --flake .
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```
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Yay, you're now using NixOS in flakes mode!
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> [!NOTE]
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> If you run the `sudo nixos-rebuild switch` command, without the `--flake .`
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> it would look for the `flake.nix` file in `/etc/nixos`.
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> [!TIP]
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> Notice the `nixosConfigurations` (plural) key in our flake, suggesting that
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> it can hold multiple configurations. Indeed, it can! You can use a single
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> flake to manage multiple systems.
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>
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> The name for the configuration just needs to match the hostname of your
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> machine, which by default will be `nixos`.
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>
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> Alternatively, you can also pick which configuration to use manually in the
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> rebuild command, like so: `nixos-rebuild --flake .#my-configuration`, which
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> would pick a config named `my-configuration`.
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You can notice that this also created a `flake.lock` file, containing the exact
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versions of all of the packages you're using. Let's add this file to git too:
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`git add flake.lock`.
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And now we're ready to make our first commit:
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```sh
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git commit -m "Initial commit"
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```
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## Updating
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Over time, you'll want to update the software that's installed on your machine,
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to do that, we'll first want to update the `flake.lock` file, which contains
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the commit sha of the nixpkgs repo that's being used. To do so, you can use
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this command (while in `~/dots` directory):
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```sh
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nix flake update
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```
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After which, you'll probably also want to rebuild your system and switch:
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```sh
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nixos-rebuild switch --flake .
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```
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> [!TIP]
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> This replaces the legacy (non-flake) regime's command: `nixos-rebuild switch --upgrade`
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## Home-Manager
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Home-Manager is a way to bring nix features to your home directory. It allows
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you to version and manage your configuration files that usually live in your
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home directories, like `~/.config` with the usual nix tooling. This can help
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you achieve full reproducibility for the user side, not just the system side.
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First, let's add home-manager as an input to our flake:
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```nix
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home-manager = {
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url = "github:nix-community/home-manager";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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```
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```nix
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{
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description = "ItsDrike's NixOS configuration";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
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home-manager = {
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url = "github:nix-community/home-manager";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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};
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outputs = { self, nixpkgs, ...} @ inputs: {
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nixosConfigurations = {
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nixos = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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modules = [ ./configuration.nix ];
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};
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};
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};
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}
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```
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