# Use a custom configuration.nix location.
  # $ darwin-rebuild switch -I darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix
  environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
  home-manager.users.christophercummings = { pkgs, ... }: {
    imports = [ ../nixpkgs/home.nix ];
  };

  services.yabai.package = pkgs.yabai;

  # services.yabai.package = pkgs.yabai;

  services.skhd.package = pkgs.skhd;

  # services.skhd.package = pkgs.skhd;

  launchd.user.agents.syncemail = {
    command = "${pkgs.isync}/bin/mbsync -a && mu ${pkgs.mu}/bin/mu index";
    serviceConfig.StartInterval = 60 * 5;
  };

  # launchd.user.agents.syncemail = {
  #   command = "${pkgs.isync}/bin/mbsync -a && mu ${pkgs.mu}/bin/mu index";
  #   serviceConfig.StartInterval = 60 * 5;
  # };

  * [install nix](https://nixos.org "nixos")
  * [install home-manager](https://github.com/nix-community/home-manager#installation)

  * [install nix](https://nixos.org/download.html#nix-quick-install "nixos")
    * NOTE: double check all the install commands if something goes wrong, things may have changed upstream
    ``` sh
    sh <(curl -L https://nixos.org/nix/install)
    ```
      * on recent versions of macos you'll need to add a special flag
    ``` sh
    sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume
    ```
  * [install nix-darwin](https://github.com/LnL7/nix-darwin#install "nix-darwin-install-instructions") if on macos
    ``` sh
    nix-build https://github.com/LnL7/nix-darwin/archive/master.tar.gz -A installer
    ./result/bin/darwin-installer
    ```
  * [install home-manager](https://github.com/nix-community/home-manager#installation) follow the instructions at the link
    * if on macos also follow the instructions for [integrating home-manager as a nix-darwin module](https://nix-community.github.io/home-manager/index.html#sec-install-nix-darwin-module "home-manager-nix-darwin-module")

    ``` sh
    git clone https://github.com/averagechris/dotfiles.git
    ```

    * this is for local machine specific config like user name, directory and anything else
  * if configuring email, edit `email/default.nix` to import the emails you want on this machine
    * use `email/example-email.nix` as a guide
  * run `ln -fs ~/dotfiles/nixpkgs ~/.config/` to create the symlink for home-manager config
  * run `home-manager switch`
  * start emacs and run

    ``` sh
    cp ~/dotfiles/nixpkgs/localhome/example.nix ~/dotfiles/nixpkgs/localhome/default.nix
    ```
    * modify `localhome/default.nix` according to the needs of the system (like choosing what to install and some PII info)
  * symlink `~/dotfiles/nixpkgs` to `~/.config/`
  ``` sh
  ln -fs ~/dotfiles/nixpkgs ~/.config/
  ```
  * build the configuration
    * for non-macos
      * if on non-macos
  ``` sh
  home-manager switch
  ```
      * if on macos  (only the first call to darwin-rebuild requires the darwin-config argument)
      ``` sh
    darwin-rebuild switch -I "darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix"
      ```
  * finish installing emacs dependencies by starting emacs and running the following functions

* to update to the latest packages run `nix-channel --update` before running `home-manager switch`
* Optionally run `stow $DIR -t ~` for any other $DIR in `~/dotfiles/stowed` to symlink the related configs

* to update to the latest packages run `nix-channel --update` before running `home-manager switch` or `darwin-rebuild`

### Troubleshooting
#### Start Over get rid of nix completely
* `rm -rf /nix`
  * if you get an error on macos remove nix from `/synthetic.conf` and try again
* on macos use disk utility app to delete the `nix` apfs volume
* restart system
* nix is now gone completely so you can follow the install instructions to start over
#### After macos update / upgrade
* tl;dr; these can sometimes replace the changes necessary in `/etc/zprofile` and `/etc/zshrc` meaning we need to intervene manually.
``` sh
sudo mv /etc/zshrc /etc/zshrc.bak
sudo mv /etc/zprofile /etc/zprofile.bak
sudo /nix/var/nix/profiles/system/activate
exit  # Start a new shell to reload the environment.
```