flake.nix

{
  description = "A website";

  # Nixpkgs / NixOS version to use.
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/23.11";

  outputs = { self, nixpkgs }:
    let

      # to work with older version of flakes
      lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";

      # Generate a user-friendly version number.
      version = builtins.substring 0 8 lastModifiedDate;

      # System types to support.
      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];

      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    in
    {
      devShell = forAllSystems (system:
        let pkgs = nixpkgs.legacyPackages.${system};
        in pkgs.mkShell { buildInputs = [pkgs.php83 pkgs.php83Packages.composer]; }
      );
    };
}