let
  pkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/afbf62d179bff8b3191316eab9890255b512bf78.tar.gz") {};

  # reproducible source
  gitignoreSrc = pkgs.fetchFromGitHub {
    owner = "hercules-ci";
    repo = "gitignore";
    rev = "c4662e662462e7bf3c2a968483478a665d00e717";
    sha256 = "sha256:1npnx0h6bd0d7ql93ka7azhj40zgjp815fw2r6smg8ch9p7mzdlx";
  };
  inherit (import gitignoreSrc { inherit (pkgs) lib; }) gitignoreSource;

  texlive = pkgs.texlive.combine {
    inherit (pkgs.texlive) scheme-small
      biber
      biblatex
      biblatex-iso690
      csquotes
      datetime2
      datetime2-german
      latexmk
      lipsum
      tracklang;
  };
in
pkgs.stdenv.mkDerivation {
  name = "seminararbeit.pdf";

  nativeBuildInputs = [
    texlive
  ];

  src = gitignoreSource ./.;

  # We only build a PDF
  dontFixup = true;

  installPhase = "cp $name $out";
}