From 68e05a361d4fa0f71e98fae69882e670dfa4dd48 Mon Sep 17 00:00:00 2001
From: Bas van Dijk <v.dijk.bas@gmail.com>
Date: Mon, 23 Oct 2017 19:17:40 +0200
Subject: [PATCH] haskell: ghcjs packages: fix build of fail

---
 pkgs/development/haskell-modules/configuration-ghcjs.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghcjs.nix b/pkgs/development/haskell-modules/configuration-ghcjs.nix
index 0f17f5ce707b..bd35c1cb3ae2 100644
--- a/pkgs/development/haskell-modules/configuration-ghcjs.nix
+++ b/pkgs/development/haskell-modules/configuration-ghcjs.nix
@@ -68,6 +68,9 @@ self: super:
 
 ## OTHER PACKAGES
 
+  # haddock throws the error: No input file(s).
+  fail = dontHaddock super.fail;
+
   cereal = addBuildDepend super.cereal [ self.fail ];
 
   entropy = overrideCabal super.entropy (old: {