{
  lib,
  stdenv,
  systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd,
  systemd,
}:
stdenv.mkDerivation {
  pname = "sin";
  version = "0.1.0";

  src = let
    fs = lib.fileset;
    s = ../.;
  in
    fs.toSource {
      root = s;
      fileset = fs.unions [
        (s + /Makefile)
        (s + /main.c)
      ];
    };

  strictDeps = true;
  buildInputs = lib.optionals systemdSupport [systemd];

  installPhase = ''
    runHook preInstall

    mkdir -p $out/bin
    install -Dm755 sin $out/bin/sin

    runHook postInstall
  '';

  meta = {
    description = "Keep system idle inhibited while named processes run";
    license = lib.licenses.mit;
    maintainers = [lib.maintainers.NotAShelf];
    platforms = lib.platforms.linux;
  };
}