From 7f0e9659f700084d0a80a86eef7258617194d5a7 Mon Sep 17 00:00:00 2001
From: Jude Taylor <me@jude.bio>
Date: Wed, 28 Oct 2015 14:19:15 -0700
Subject: [PATCH] double-conversion: propagate libcxx

Packages that depend on double-conversion may fail their doctests if dlopen(libc++.dylib)
fails.
---
 pkgs/development/haskell-modules/configuration-common.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 089ad34dee4..7d3407a2888 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -217,12 +217,12 @@ self: super: {
 
   double-conversion = if !pkgs.stdenv.isDarwin
     then super.double-conversion
-    else overrideCabal super.double-conversion (drv:
+    else addBuildDepend (overrideCabal super.double-conversion (drv:
       {
         postPatch = ''
           substituteInPlace double-conversion.cabal --replace stdc++ c++
         '';
-      });
+      })) pkgs.libcxx;
 
   # tests don't compile for some odd reason
   jwt = dontCheck super.jwt;