{
  lib,
  mkShell,

  buildDunePackage,
  ptime,
  ppxlib,
  ppx_unicode,

  ocaml,
  dune_3,
  odoc,
  utop,

  enableShell ? false
}:

let
  sourceRoot = ./.;
  fs = lib.fileset;
  sourceFiles = fs.difference
    (fs.gitTracked sourceRoot)
    (fs.fileFilter (file: file.hasExt "nix") sourceRoot);
  sourceSet = fs.toSource { root = sourceRoot; fileset = sourceFiles; };
in buildDunePackage rec {
  pname = "xlog";
  version = "0.0.2";
  src = sourceSet;

  minimalOCamlVersion = "5.1";
  dontStrip = true;

  buildInputs = [ ppx_unicode ];
  propagatedBuildInputs = [ ptime ppxlib ];
  nativeBuildInputs = [ ppxlib ppx_unicode ] ++ lib.optionals enableShell [
    ocaml dune_3 odoc utop
  ];
}