{ config, pkgs, inputs, ... }:
{

  nix = {
    package = pkgs.nix;
    useSandbox = true;
    extraOptions = ''
      experimental-features = nix-command flakes
    '';
  };

  imports = [
    ./program-neovim.nix
  ];
  # I'm not a zealot about this one.
  nixpkgs.config.allowUnfree = true;

  nixpkgs.overlays = [
   (self: super: {
     neovim = super.neovim.override {
       viAlias = true;
       vimAlias = true;
     };
   })
   inputs.rust-overlay
  ];

  environment.variables = {
    EDITOR="nvim";
    PAGER="less -R";
  };

  programs = with pkgs; {
    neovim.enable = true;
    neovim.configure = {
      customRC = (builtins.readFile ../../.vimrc);
      packages.myVimPackage = with pkgs.vimPlugins; {
        start = [
                coc-nvim
                nerdtree
                vim-nix
                coc-rust-analyzer
                coc-diagnostic
                coc-markdownlint
                coc-tslint
                coc-explorer
                coc-git
                coc-vimlsp
                coc-python
                coc-clangd
                coc-go
                coc-html
                coc-css
                coc-yaml
                coc-json
                vim-toml
                hoon-vim
        ];
      };
    };
    zsh.enable = true;  # default shell on catalina
  };

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment.systemPackages =
    with pkgs; [
        nodejs
        tmux
        gnumake
        # TODO find a version of the julia package that will install
        # on darwin and add it as an overlay
        python
        emacs
        git
        mercurial
        bash
        curl
        wget
        jq
        spacebar
        coreutils
        watch
        iterm2
        go
        htop
        colima
        lima
        rlwrap
        docker-client
        google-cloud-sdk
        inputs.sile
        inputs.runwhen
        inputs.durnitisp
        inputs.jj
        # TODO add sonic-pi here if it supports the arch
    ];

  # 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";

  # Auto upgrade nix package and the daemon service.
  services.nix-daemon.enable = true;

  #services.spacebar.enable = true;
  #services.spacebar.package = "${pkgs.spacebar}";

  # Create /etc/bashrc that loads the nix-darwin environment.
  # programs.bash.enable = true;  # default shell on catalina
  # programs.fish.enable = true;

  # Used for backwards compatibility, please read the changelog before changing.
  # $ darwin-rebuild changelog
  system.stateVersion = 4;
}