From bf6fdae0f26546d96d08a51f623f910c2a0efa18 Mon Sep 17 00:00:00 2001
From: Ryan Trinkle <ryan.trinkle@gmail.com>
Date: Wed, 27 Jul 2016 11:44:39 -0400
Subject: [PATCH] ghcjs: work around haskell/cabal#3494

See also NixOS/nixpkgs#16144
---
 pkgs/development/compilers/ghcjs/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/compilers/ghcjs/default.nix b/pkgs/development/compilers/ghcjs/default.nix
index f677cd771229..2c7688190978 100644
--- a/pkgs/development/compilers/ghcjs/default.nix
+++ b/pkgs/development/compilers/ghcjs/default.nix
@@ -97,6 +97,8 @@ in mkDerivation (rec {
       --replace "@CC@"     "${stdenv.cc}/bin/cc"
   '';
   preBuild = ''
+    export HOME="$TMP"
+
     local topDir=$out/lib/ghcjs-${version}
     mkdir -p $topDir