Re: Proposal: System.Environment.getEnv should return Maybe

So I propose a function: lookupEnv :: String -> IO (Maybe String)

We already have System.Posix.Env.getEnv :: String -> IO (Maybe String) So for consistency I'd advocate for renaming that to lookupEnv, too. (keeping getEnv as a deprecated alias, for backward compatibility). Other than that, +1. Cheers, Simon