{ pkgs, ... }:
let
  version = "hpd-0.2.0";
  newSrc = pkgs.fetchhg {
    url = "https://mirror.octobus.net/heptapod/heptapod-runner";
    rev = "b4fda456f403";
    sha256 = "1ybkd2jnq2dvkj157w2nlf9rmrgbd8kas43kimi9aarajgi9sri1";
  };
  wrappedMercurial = pkgs.symlinkJoin {
    name = pkgs.mercurial.name;
    paths = [ pkgs.mercurial ];
    postBuild = ''
      mkdir -p "$out/etc/mercurial"
      cp "${newSrc}/dockerfiles/build/runner.hgrc" "$out/etc/mercurial/hgrc"
    '';
  };
in
pkgs.gitlab-runner.overrideAttrs (oldAttrs: rec {
  inherit version;
  buildInputs = oldAttrs.buildInputs ++ [ wrappedMercurial pkgs.makeWrapper ];
  src = newSrc;
  postInstall = ''
    wrapProgram $bin/bin/gitlab-runner --prefix PATH : ${wrappedMercurial}
  '';
})