NixOS configuration

My device-agnostic Nix OS configuration.

Do not clone directly into /etc/nixos. This is annoying due to having to call sudoedit.

Install channel

nix-channel --add nixos https://nixos.org/channels/nixos-24.11 nixos
sudo nix-channel --add nixos https://nixos.org/channels/nixos-24.11 nixos
sudo nix-channel --update

On upgrades, just run the same with whatever channels is mentioned in the main config file.

How to apply configuration

1. Edit files in this repository
2. Sync to /etc/nixos/ by running sudo ./sync.sh
3. Rebuild via sudo nixos-rebuild switch

Hardware configuration

The hardware configuration is spread across files.

Hierarchy:

• hardware-configuration.nix

  Contains generic configuration.

• hardware-<device-type>.nix

  Contains device specific configuration and imports the generic configuration.

• hardware-config-import.nix

  Decides which hardware specific configuration is imported and isn't tracked by git. This file is then imported by configuration.nix.

Since the concrete hardware configurations most likely use community provided defaults, install the given channel:

sudo nix-channel --add https://github.com/NixOS/nixos-hardware/archive/master.tar.gz nixos-hardware
sudo nix-channel --update

To add a new machine, check out the repo and create the hardware-config-import.nix and decide whether you need a new device specific configuration or import the generic one.

The file looks like this:

{ config, ... }:

{
  imports = [ ./hardware-thinkpad-l570.nix ];
}

For the concrete hardware configuration, you'll also have to specify the filesystem. For this, you need the UUID of the drives. You can list the UUIDs via ls /dev/disk/by-uuid.

Then add the following section:

  fileSystems."/" =
    { device = "/dev/disk/UUID";
      fsType = "ext4";
    };

Issues

• IntelliJ doesn't automatically find the JDK22, the workaround for now is manual installation via IntelliJ, even though this will duplicate the JDK.