My personal Nix configuration flake

Configuration for my personal machines (both macOS and NixOS).

Credits to buntec/nix-config; my config started as a clone of that repo.

Fresh NixOS install

After installing NixOS from a USB drive, follow these steps:

1. Clone this repo and cd into it. Use nix-shell -p git to access git.

2. Copy /etc/nixos/hardware-configuration.nix into ./system (OK to overwrite existing dummy file).

3. Build and activate NixOS config:

sudo nixos-rebuild switch --flake .#lenovo-desktop # the fragment can be dropped if it matches your current host name

# alternatively, using the `apps` provided by the flake:
sudo nix run .#rebuild-lenovo-desktop

4. Activate home-manager:

sudo nix run .#hm-switch-lenovo-desktop

5. After the initial installation, again cd into the repo, and activate direnv by typing direnv allow. Now you can use the simpler commands to for rebuild and hm switch:

# rebuild switch
sudo just rebuild

# hm switch
just hm-switch

Fresh macOS install

(Heavily inspired by this gist)

To bootstrap a fresh macOS install, follow these steps:

1. Install Homebrew (only needed for managing GUI apps via casks)

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

2. Install Nix:

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

3. Clone this repo, cd into it, then build and activate with one command:

nix run .#rebuild-macbook-pro-m1 # nix-darwin
nix run .#hm-switch-macbook-pro-m1 # home-manager

4. After the initial installation, again cd into the repo, and activate direnv by typing direnv allow. Now you can use the simpler commands to for rebuild and hm switch:

# rebuild switch
just rebuild

# hm switch
just hm-switch

# rebuild & hm-switch
just

Migrating an existing macOS install to Nix

1. Uninstall Homebrew:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"

2. Delete everything under ~/.config and any other "dot files" in your home directory.

3. Delete all applications that are listed as Homebrew casks in ./system/configuration-darwin.nix

4. Follow the steps for a fresh macOS install.