From 69cda1a7c0fa7e0b11eb3648373389f8e06a68d9 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 23 Jan 2015 08:16:53 +0100
Subject: [PATCH] haskell-generic-builder: set locale to "UTF-8" in nix-shell
 environments

The package builder did this already, but I forgot to add the setting in
the interactive environment.

Fixes https://github.com/NixOS/nixpkgs/issues/5904.
---
 pkgs/development/haskell-modules/generic-builder.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index b6fde0a303c4..303a9d7859a9 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -252,6 +252,8 @@ stdenv.mkDerivation ({
     env = stdenv.mkDerivation {
       name = "interactive-${optionalString hasActiveLibrary "haskell-"}${pname}-${version}-environment";
       nativeBuildInputs = [ ghcEnv systemBuildInputs ];
+      LANG = "en_US.UTF-8";
+      LOCALE_ARCHIVE = optionalString stdenv.isLinux "${glibcLocales}/lib/locale/locale-archive";
       shellHook = ''
         export NIX_GHC="${ghcEnv}/bin/ghc"
         export NIX_GHCPKG="${ghcEnv}/bin/ghc"