This is just a convenient shorthand so people don't have to spell out
haskellPackages.cryptol
Note that the top-level expression is named 'cryptol2' but the package
isn't. That's because Cryptol is a library and other things could depend
on it (hence the vanilla name), but also the full name will be
disambiguated as 'haskell-cryptol-ghc7.6.3' anyway.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
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