NIX Configuration for developers

Install

Firstly, lets install Nix:

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

And Brew:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
echo >> /Users/juan/.zprofile
echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> /Users/juan/.zprofile
eval "$(/opt/homebrew/bin/brew shellenv)"

Then we have to restart the terminal and install Nix Darwin, this is the nix tool that we will be using to configure our machine:

brew install wget
mkdir -p ~/.config/nix-darwin
cd ~/.config/nix-darwin
nix flake init -t nix-darwin
rm flake.nix
wget https://raw.githubusercontent.com/Light-it-labs/developer-nix/refs/heads/main/flake.nix
sed -i '' "s/simple/$(scutil --get LocalHostName)/" flake.nix

To run it for the first time use:

nix run nix-darwin -- switch --flake ~/.config/nix-darwin

Tip

If the icons on the dock look like a "?" then restart your terminal and run the command on the next section to refresh the dock.

Rebuilding

To update the mac once the configuration file is changed, you can run:

darwin-rebuild switch --flake ~/.config/nix-darwin

Add Alacritty configuration

mkdir -p ~/.config/alacritty
cd ~/.config/alacritty
wget https://raw.githubusercontent.com/Light-it-labs/developer-nix/refs/heads/main/alacrity.toml