Build with cabal

Change setup to build site with cabal version 2.4 and ghc version 8.6.4
on OpenBSD 6.8.

1 files changed, 1 insertions, 0 deletions

diff --git a/site.hs b/site.hs
index 118eb34..338582c 100644
--- a/site.hs
+++ b/site.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 
 import Control.Monad (msum)
+import Control.Monad.Fail (MonadFail)
 import Data.Time (TimeLocale, formatTime, parseTimeM, defaultTimeLocale, UTCTime)
 import Hakyll
 import System.FilePath.Posix ((</>), (<.>), splitExtension, splitFileName, takeDirectory)