This is my flake-based NixOS and nix-darwin system configs, with home-manager added as a module for user-level configs. My goal was to maintain a consistent and reproducible development environment across multiple machines (currently: a linux laptop running NixOS, a macOS machine) using a single, multi-platform Nix flake.

Extended tahia vs. nix journey documented here.

• multi-platform support: a single flake.nix file manages configurations for both nixos and nix-darwin

• declarative configuration: all system packages, dotfiles, and user settings are managed declaratively using Nix

• shared home-manager modules: common settings and packages like nixvim, zsh, and tmux are shared between hosts through the home/common directory

• host-specific overrides: each machine has its own directory under hosts for hardware-specific settings and system services

• secrets management: secrets are managed using sops-nix

Clone this repository to ~/.nixfiles. Then:

sudo nixos-rebuild switch --flake .#lolbox

Install Determinate Nix and clone this repo to ~/.nixfiles.

Run the following command to build and activate the nix-darwin system profile and fix directory permissions from using sudo. sudo is necessary for system-level changes.

sudo nix --extra-experimental-features "nix-command flakes" run nix-darwin -- switch --flake .#pz-macbook
sudo chown -R tahia:staff /Users/tahia/.local

Once the command finishes, darwin-rebuild will be available in your shell.

After the initial setup, you can update your configurations with the following commands.

NixOS: sudo nixos-rebuild switch --flake .#lolbox

darwin: sudo darwin-rebuild switch --flake .#pz-macbook

This builds a new system generation and creates a symlink to it, including the activation step for home-manager since it's configured as a module.