message: xtask: Print copying
diff: @@ -52,6 +52,11 @@ impl flags::Build {
  let build_archive = self.build_archive();
  let dist_archive = self.dist_archive();
  + eprintln!(
  + "Copying {} to {}",
  + build_archive.display(),
  + dist_archive.display()
  + );
  sh.create_dir(dist_archive.parent().unwrap())?;
  sh.copy_file(&build_archive, &dist_archive)?;
  