i-am-tom/holmes

Failing to build Watson: MonadFail not in scope

Soupstraw opened this issue · 0 comments

Soupstraw commented

Tried to install holmes from Cabal and got this error:

src/Control/Monad/Watson.hs:55:10: error:
    Not in scope: type constructor or class ‘MonadFail’
   |
55 | instance MonadFail (Watson h) where
   |          ^^^^^^^^^

I'm using GHC version 8.6.5, it seems to be failing on Hackage CI as well.