nix-darwin

Nix modules for darwin, /etc/nixos/configuration.nix for macOS.

Install

bash <(curl https://raw.githubusercontent.com/LnL7/nix-darwin/master/bootstrap.sh)

This will link the system profile to /run/current-system. You have to create /run or symlink it to private/var/run. If you use a symlink, you'll probably also want to add services.activate-system.enable = true; to your configuration.

NOTE: the system activation scripts don't overwrite existing etc files, so files like /etc/bashrc won't be used by default. Either modify the existing file to source/import the one from /etc/static or remove it. Some examples:

• mv /etc/bashrc /etc/bashrc.orig
• echo 'if test -e /etc/static/bashrc; then . /etc/static/bashrc; fi' | sudo tee -a /etc/bashrc
• echo 'if test -e /etc/static/bashrc; then . /etc/static/bashrc; fi' | tee -a ~/.bashrc

Updating

The bootstrap installer will configure a channel for this repository.

nix-channel --update darwin

Example configuration

Check out modules/examples for some example configurations.

{ pkgs, ... }:
{

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment.systemPackages =
    [ pkgs.nix-repl
    ];

  # Create /etc/bashrc that loads the nix-darwin environment.
  programs.bash.enable = true;

  # Recreate /run/current-system symlink after boot.
  services.activate-system.enable = true;

}

Manual Install

# install nixpkgs version, which enables libsodium support (for signed binary caches)
# this is not required if you already upgraded nix at some point
nix-env -iA nixpkgs.nix

sudo ln -s private/var/run /run

git clone git@github.com:LnL7/nix-darwin.git ~/.nix-defexpr/darwin
cp ~/.nix-defexpr/darwin/modules/examples/simple.nix ~/.nixpkgs/darwin-configuration.nix

# bootstrap build using default nix.nixPath
export NIX_PATH=darwin=$HOME/.nix-defexpr/darwin:darwin-config=$HOME/.nixpkgs/darwin-configuration.nix:$NIX_PATH

# you can also use this to rebootstrap nix-darwin in case
# darwin-rebuild is to old to activate the system.
$(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild build
$(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild switch

. /etc/static/bashrc

... or for fish:

(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild build
(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild switch

This will create and manage a system profile in /run/current-system, just like nixos.

The default NIX_PATH in nix-darwin will look for this repository in ~/.nix-defexpr/darwin and for your configuration in ~/.nixpkgs/darwin-configuration.nix. If you want to change these you can set your own with nix.nixPath = [ ];.

$ darwin-rebuild switch
building the system configuration...
these derivations will be built:
  /nix/store/vfad6xgjzr56jcs051cg6vzch4dby92y-etc-zprofile.drv
  /nix/store/cbmkscxsz0k02ynaph5xaxm1aql0p3vq-etc.drv
  /nix/store/r5fpn177jhc16f8iyzk12gcw4pivzpbw-nixdarwin-system-16.09.drv
building path(s) ‘/nix/store/wlq89shja597ip7mrmjv7yzk2lwyh8n0-etc-zprofile’
building path(s) ‘/nix/store/m8kcm1pa5j570h3indp71a439wsh9lzq-etc’
building path(s) ‘/nix/store/l735ffcdvcvy60i8pqf6v00vx7lnm6mz-nixdarwin-system-16.09’
setting up /etc...
setting up launchd services...
writing defaults...
$

$ darwin-option services.activate-system.enable                                                                                                                                            ~/src/nix-darwin
Value:
true

Default:
false

Example:
no example

Description:
Whether to activate system at boot time.

Modules

• environment
• launchd.daemons
• launchd.envVariables
• launchd.user.agents
• networking
• nix
• programs
• security
• services
• system.defaults
• system
• time