--- happy-1.19.9/happy.cabal.orig	2018-02-04 16:17:42 UTC
+++ happy-1.19.9/happy.cabal
@@ -129,7 +129,7 @@ extra-source-files:
         tests/typeclass_monad_lexer.y
 
 custom-setup
-  setup-depends: Cabal <2.2,
+  setup-depends: Cabal <2.6,
                  base <5,
                  directory <1.4,
                  filepath <1.5