Import <> from Data.Monoid.
This operator used to be made available by some of the imports, but apparently
this is no longer so in recent versions of the dependencies.
commite503c79a9b9e8be609a8f5b66336fb30857148fb
authorPeter Simons <simons@cryp.to>
dateWed 24 Aug 2016, 17:22 (10 years ago)
parent2d862ae
cabal2nix/Main.hs+1
@@ -6,6 +6,7 @@ module Main ( main ) where
66import Control.Exception ( bracket )
77import Control.Lens
88import Data.Maybe ( fromMaybe )
9+import Data.Monoid ( (<>) )
910import qualified Data.Set as Set
1011import Data.String
1112import qualified Distribution.Compat.ReadP as P