{
  description = "Cobalt nix-darwin system flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nix-darwin.url = "github:nix-darwin/nix-darwin/master";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";

    nix-homebrew.url = "github:zhaofengli/nix-homebrew";
    nix-wallpaper.url = "github:lunik1/nix-wallpaper";
  };

  outputs =
    inputs@{
      self,
      nix-darwin,
      nixpkgs,
      nix-homebrew,
      nix-wallpaper,
    }:
    let
      system = "aarch64-darwin";

      wallpaper = nix-wallpaper.packages.${system}.default.override {
        preset = "catppuccin-frappe";
        logoSize = 25;
      };

      configuration =
        {
          pkgs,
          config,
          lib,
          ...
        }:
        {
          system.primaryUser = "melodidey";
          nixpkgs.config.allowUnfree = true;

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

            pkgs.git
            pkgs.cloc
            pkgs.jq
            pkgs.fortune
            pkgs.cowsay
            pkgs.tig
            pkgs.mpv
            pkgs.inetutils
            pkgs.micro
            pkgs.stow
            pkgs.fastfetch
            pkgs.ripgrep
            pkgs.ffmpeg

            pkgs.nixos-anywhere

            # pkgs.discord
            # pkgs.signal-desktop

            pkgs.nixd
            pkgs.nixfmt

            pkgs.dotnet-sdk_10
            pkgs.python3
            pkgs.pipx

            #pkgs.jetbrains.rider
            #pkgs.jetbrains.idea
            #pkgs.jetbrains.datagrip

            pkgs.docker
            pkgs.docker-compose
            pkgs.colima

            pkgs.k9s
            pkgs.kubectl
          ];

          fonts.packages = [
            pkgs.nerd-fonts.jetbrains-mono
          ];

          homebrew = {
            enable = true;
            taps = [
              "can1357/tap"
            ];
            brews = [
              "mole"
              "omp"
            ];
            casks = [ ];
            onActivation.cleanup = "zap";
          };

          services.postgresql = {
            enable = true;
            package = pkgs.postgresql_18;
            dataDir = "/Users/melodidey/Library/Application Support/Postgres";

            authentication = pkgs.lib.mkForce ''
              	      # TYPE  DATABASE        USER            ADDRESS                 METHOD
              	      local   all             all                                     trust
              	      host    all             all             127.0.0.1/32            trust
              	      host    all             all             ::1/128                 trust
              	    '';

            #ensureDatabases = [ "master" ];
            #ensureUsers = [
            #  {
            #   name = "melodidey";
            #    ensurePermissions = {
            #      "DATABASE master" = "ALL PRIVILEGES";
            #    };
            #  }
            #];
          };

          system.activationScripts.postActivation.text = ''
            sudo -u melodidey /run/current-system/sw/bin/stow \
              --dir="/Users/melodidey/dotfiles" \
              --target="/Users/melodidey" \
              --restow "."

              osascript -e "tell application \"System Events\" to tell every desktop to set picture to \"${wallpaper}/share/wallpapers/nixos-wallpaper.png\" as POSIX file"
          '';

          system.defaults = {
            dock.autohide = true;
            dock.static-only = false;
            dock.persistent-apps = [
              "/System/Cryptexes/App/System/Applications/Safari.app"
              "/System/Applications/Music.app"
              "/Applications/Discord.app"
              "/Applications/Signal.app"
              "/System/Applications/Messages.app"
              "${pkgs.ghostty-bin}/Applications/Ghostty.app"
              "${pkgs.zed-editor}/Applications/Zed.app"
            ];
            dock.persistent-others = [
              "/Users/melodidey/Downloads"
            ];

            finder.AppleShowAllExtensions = true;
            trackpad.Clicking = true;
            loginwindow.GuestEnabled = false;
          };

          # Necessary for using flakes on this system.
          nix.settings.experimental-features = "nix-command flakes";

          # Enable alternative shell support in nix-darwin.
          # programs.fish.enable = true;

          # Set Git commit hash for darwin-version.
          system.configurationRevision = self.rev or self.dirtyRev or null;

          # Used for backwards compatibility, please read the changelog before changing.
          # $ darwin-rebuild changelog
          system.stateVersion = 6;

          # The platform the configuration will be used on.
          nixpkgs.hostPlatform = system;
          nix.linux-builder.enable = true;
        };
    in
    {
      # Build darwin flake using:
      # $ darwin-rebuild build --flake .#cobalt
      darwinConfigurations."cobalt" = nix-darwin.lib.darwinSystem {
        modules = [
          configuration
          nix-homebrew.darwinModules.nix-homebrew
          {
            nix-homebrew = {
              enable = true;
              #enableRosetta = true;
              user = "melodidey";
              autoMigrate = true;
            };
          }
        ];
      };
    };
}