{
  description = "Kimai Heatmap Plugin dev environment";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, nixpkgs }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
      php = pkgs.php82.buildEnv {
        extensions = { enabled, all }: enabled ++ (with all; [ xsl pdo_mysql ]);
      };
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        buildInputs = [
          php
          pkgs.php82Packages.composer
          pkgs.nodejs_22
          pkgs.mariadb
          pkgs.symfony-cli
          pkgs.process-compose
        ];

        shellHook = ''
          echo ""
          echo "Kimai Heatmap Plugin - Dev Environment"
          echo "  First-time setup:  bash dev/setup.sh"
          echo "  Start dev stack:   process-compose -f dev/process-compose.yaml up"
          echo ""
        '';
      };
    };
}