If a plugin is open in VS Code with default settings while running update-excerpts, it will often failure with an unhelpful error message like:

Cannot rename file to '[...]/example/.dart_tool/pub/bin/build_runner/build_runner.dart-2.18.0-216.0.dev.snapshot', path = '[...]/example/.dart_tool/pub/incremental/build_runner/tmpOZSDBC/build_runner.dart.incremental.dill.incremental.dill' (OS Error: No such file or directory, errno = 2)

It seems to be a race with the setting to run pub get when the pubspec.yaml changes, which we change on the fly as part of that command. We should see if we can find a way to avoid the race, since having to close the project is kind of annoying. For now I'll document it in the wiki.