> This fixes a build failure in the 'sanity-check' phase.
> +             (substitute* "args.py"
> +               (("basestring") "str"))

Does it actually fix the build failure, or is it only suppressed?

Looking at

<https://github.com/kennethreitz-archive/args/blob/master/args.py>,
line 15--18, it appears that basestring should actually be basestring,
at least for Python 2 (python2-args).

Also, returning #true isn't necessary anymore, and this seems better
fit for a snippet.

Greetings,
Maxime.