store-0.6.0 fails to build with GHC-7.10 and GHC-7.8

[sjakobi]

src/Data/Store/TH.hs:40:18:
    Could not find module ‘Control.Monad.Fail’
    It is a member of the hidden package ‘fail-4.9.0.0@9VfzPgZmVnyGDICixWHnyA’.
    Perhaps you need to add ‘fail’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

[sjakobi]

BTW I do agree with the suggestion from #142 (comment) to use CI! Note that the AppVeyor builds are currently broken: https://ci.appveyor.com/project/snoyberg/store/builds/28168838

[mgsloan]

Fixed!