Add a note about Cabal's parsec flag

c97bd1a9 · Oleg Grenrus · 856b6e1b · c97bd1a9
Commit c97bd1a9 authored Jan 19, 2017 by Oleg Grenrus
--- a/cabal-install/cabal-install.cabal
+++ b/cabal-install/cabal-install.cabal
@@ -195,7 +195,7 @@ Flag debug-tracetree
  default:      False

 flag parsec
-  description:  Use parsec parser
+  description:  Use parsec parser. This requires 'Cabal' library built with its parsec flag enabled.
  default:      False
  manual:       True