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.

Update Terraform

The terraform version installed by Nix is deprecated. Ensure you update the package version by running:

brew update
brew upgrade terraform

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