message: attempt to fix test suite race on mac
diff: @@ -2545,6 +2545,7 @@ fn rebuild_only_on_explicit_paths() {
  sleep_ms(1000);
  File::create(p.root().join("foo")).unwrap();
  File::create(p.root().join("bar")).unwrap();
  + sleep_ms(1000); // make sure the to-be-created outfile has a timestamp distinct from the infiles
  // now the exist, so run once, catch the mtime, then shouldn't run again
  println!("run with");
  