From c779fe98043ee2123fa36187837423469d0cbc50 Mon Sep 17 00:00:00 2001
From: Jude Taylor <me@jude.bio>
Date: Sun, 21 Jun 2015 00:57:50 -0700
Subject: [PATCH] darwin purity: haskell-double-conversion

---
 .../development/haskell-modules/configuration-common.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 0ea34e55cb8..bc9cfe8173b 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -216,6 +216,15 @@ self: super: {
     '';
   });
 
+  double-conversion = if !pkgs.stdenv.isDarwin
+    then super.double-conversion
+    else overrideCabal super.double-conversion (drv:
+      {
+        patchPhase = ''
+          substituteInPlace double-conversion.cabal --replace stdc++ c++
+        '';
+      });
+
   # Does not compile: "fatal error: ieee-flpt.h: No such file or directory"
   base_4_8_0_0 = markBroken super.base_4_8_0_0;