Hi,
I just released the first version of a package that "provide new
additions to base for older versions of base" [2].  So far the following
is covered:

    readMaybe
    readEither
    lookupEnv
    getExecutablePath

Source is on GitHub [2]; patches welcome ;)

Cheers,
Simon

[1] http://hackage.haskell.org/package/base-compat
[2] https://github.com/sol/base-compat

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