{ system, self, mach-nix, leapseconds, ... }:
let
  pkgs = self.legacyPackages.${system};
in mach-nix.lib.${system}.buildPythonPackage {
  pname = "tai64dec";
  src = pkgs.lib.sourceByRegex ./. ["^setup\.py$" "^tai64dec(/[^/]+.*)?$"];
  version = "0.0.0";
  ignoreDataOutdated = true;

  requirements = ''
    leapseconddata
  '';

  postInstall = ''
    wrapProgram $out/bin/tai64dec \
      --set-default LEAPSECONDS_FILE ${leapseconds}
  '';
}