I'm trying to use zap on AWS Lambda. With the following configuration:

logger, err := zap.NewProduction()
if err != nil {
	log.Fatalf("error creating logger: %s", err)
}
...

I am getting the following error when running it on Lambda:

error syncing logger: sync /dev/stderr: invalid argument

when checking for an error on logger.Sync:

...
defer func() {
	err := logger.Sync()
	if err != nil {
		log.Fatalf("error syncing logger: %s", err)
	}
}()

So I tried changing the config to the following:

logConfig := zap.NewProductionConfig()
logConfig.OutputPaths = []string{"stdout"}
logger, err := logConfig.Build()
if err != nil {
	log.Fatalf("error creating logger: %s", err)
}

which now gives me another error (from the same call to logger.Sync):

error syncing logger: sync /dev/stdout: invalid argument

As far as I know, Lambda supports and recommends logging to stdout and stderr so I don't understand why it's not working. Is there a recommended way of fixing this?