{
  description = "PDF page number and header annotator using LaTeX";

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

  outputs = { self, nixpkgs }: let
    system = "x86_64-linux";
    pkgs = nixpkgs.legacyPackages.${system};
  in {
    packages.${system} = {
      pdf-annotator = let
        texlive = pkgs.texlive.combined.scheme-small;
        script = "run.sh";
        tex = "numbered.tex";
      in pkgs.stdenv.mkDerivation rec {
        name = "${pname}";
        pname = "pdf-annotator";
        src = ./.;
        buildInputs = [ texlive ];
        nativeBuildInputs = with pkgs; [ makeWrapper ];
        postPatch = ''
          substituteInPlace run.sh \
            --replace pdflatex ${texlive}/bin/pdflatex \
            --replace latexmk ${texlive}/bin/latexmk \
            --replace ${tex} $out/share/${tex}
        '';
        installPhase = ''
          runHook preInstall
          mkdir -p $out/bin
          cp ${script} $out/bin/${pname}
          mkdir -p $out/share
          cp ${tex} $out/share/${tex}
          wrapProgram $out/bin/${pname} --prefix PATH : ${nixpkgs.lib.makeBinPath (with pkgs; [ bash ])}
          runHook postInstall
        '';
      };
      default = self.packages.${system}.pdf-annotator;
    };
    devShells.${system}.default = with pkgs; mkShell {
      inputsFrom = with self.packages.${system}; [ pdf-annotator ];
    };
  };
}