{
  description = "Python Flask environment with SQLite support";

  inputs = {
    # Using the official capitalized name fixed the 404
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs }:
    let
      # Use "x86_64-linux" for Intel/AMD Linux
      # Use "aarch64-linux" for Raspberry Pi / ARM Linux
      # Use "aarch64-darwin" for Apple Silicon Mac
      system = "x86_64-linux"; 
      pkgs = import nixpkgs { inherit system; };
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        buildInputs = [
          pkgs.sqlite-interactive
          (pkgs.python3.withPackages (ps: [ ps.flask ]))
        ];

        shellHook = ''
          echo "--- Flask + SQLite Environment ---"
          echo "To view logs: sqlite3 logs.db 'SELECT * FROM post_logs;'"
        '';
      };
    };
}