{
  description = "mu and mu4e email package for emacs";

  inputs = { nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable"; };

  outputs = { self, nixpkgs }: {

    packages.x86_64-linux.default =
      with import nixpkgs { system = "x86_64-linux"; };
      stdenv.mkDerivation {
        name = "mu4e";
        src = self;

        nativeBuildInputs = [
          pkg-config
          meson
          ninja
          texinfo
          #installShellFiles
          emacs
          python3
          #makeWrapper # need?
          cmake
          cld2
        ];

        buildInputs = [ glib gmime3 xapian ];

        mesonFlags = [
          # "--debug"
          "-Dguile=disabled"
          "-Dreadline=disabled"
          "-Demacs=${emacs}/bin/emacs"
        ];

        # preConfigure = ''
        #   echo "=== DEBUG: Environment before meson configure ==="
        #   echo "PWD: $(pwd)"
        #   echo "Python version:"
        #   python3 --version || echo "python3 not available"
        #   echo "Python path:"
        #   #which python3 || echo "python3 not in PATH"
        #   echo "PATH: $PATH"
        #   echo "Meson version:"
        #   meson --version
        #   echo "Available files in current directory:"
        #   ls -la
        #   echo "Checking for Python scripts:"
        #   find . -name "*.py" -type f | head -10
        #   echo "=============================================="
        # '';

        meta = with lib; {
          description = "Email indexer and Emacs client (mu4e)";
          longDescription = ''
            mu is a tool for dealing with email messages stored in the
            Maildir-format. mu's purpose in life is to help you to quickly find the
            messages you need; in addition, it allows you to view messages, extract
            attachments, create new maildirs, and so on.

            mu4e is an Emacs-based e-mail client that uses mu as its back-end.
          '';
          license = licenses.gpl3Plus;
          homepage = "https://www.djcbsoftware.nl/code/mu/";
          changelog = "https://github.com/djcb/mu/blob/v${version}/NEWS.org";
          maintainers = with maintainers; [ antono chvp peterhoeg ];
          platforms = platforms.unix;
          mainProgram = "mu";
        };
      };
  };
}