message: Remove double ref on argument
diff: @@ -151,7 +151,7 @@ pub fn gen_key(name: &str, out: &Path) -> Result<(), Error> {
  Ok(())
  }
  -pub fn open_zipped_npk(npk: &&Path) -> Result<ZipArchive<File>, Error> {
  +pub fn open_zipped_npk(npk: &Path) -> Result<ZipArchive<File>, Error> {
  let zip = zip::ZipArchive::new(File::open(&npk).map_err(|e| Error::Os {
  context: format!("Failed to open NPK at '{}'", &npk.display()),
  error: e,
  