{
  fetchFromGitHub,
  stdenvNoCC,
  lib,
}:
let
  rev = "b344ab770e4c08d0bb13c38ea61979b282e24db7";
in
stdenvNoCC.mkDerivation {
  pname = "hrt-time";
  version = "unstable-" + lib.substring 0 8 rev;

  src = fetchFromGitHub {
    owner = "ariannelafraise";
    repo = "hrt-time";
    inherit rev;
    hash = "sha256-+AhLkcCETVnF6S+ov1oKxhs3M9F6ghyyERoLN3aMMxw=";
  };

  installPhase = ''
    mkdir -p $out/bin
    cp hrt-time.sh $out/bin/hrt-time
  '';

  patches = [
    ./my-day.patch
  ];

  meta.mainProgram = "hrt-time";
}