From a86ffa4988bcf8228a500f9e4493849ae90de521 Mon Sep 17 00:00:00 2001
From: Nathan van Doorn <nathan@myrtlesoftware.com>
Date: Wed, 20 Feb 2019 14:58:28 +0000
Subject: [PATCH] haskell-modules/generic-builder.nix: add haddockFlags option

---
 pkgs/development/haskell-modules/generic-builder.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 2724ff5d622..e8195668c41 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -19,6 +19,7 @@ in
 , buildTools ? [], libraryToolDepends ? [], executableToolDepends ? [], testToolDepends ? [], benchmarkToolDepends ? []
 , configureFlags ? []
 , buildFlags ? []
+, haddockFlags ? []
 , description ? ""
 , doCheck ? !isCross && stdenv.lib.versionOlder "7.4" ghc.version
 , doBenchmark ? false
@@ -372,7 +373,8 @@ stdenv.mkDerivation ({
     ${optionalString (doHaddock && isLibrary) ''
       ${setupCommand} haddock --html \
         ${optionalString doHoogle "--hoogle"} \
-        ${optionalString (isLibrary && hyperlinkSource) "--hyperlink-source"}
+        ${optionalString (isLibrary && hyperlinkSource) "--hyperlink-source"} \
+        ${stdenv.lib.concatStringsSep " " haddockFlags}
     ''}
     runHook postHaddock
   '';