From d2457ea99196710499b4d94efc6a88ab2f2d1c51 Mon Sep 17 00:00:00 2001
From: Allen Nelson <anelson@narrativescience.com>
Date: Wed, 9 Sep 2015 12:58:28 -0500
Subject: [PATCH] add shellHook argument so that users can pass in their own

---
 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 3442e8730806..bd04ab7e6a84 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -42,6 +42,7 @@
 , installPhase ? "", preInstall ? "", postInstall ? ""
 , checkPhase ? "", preCheck ? "", postCheck ? ""
 , preFixup ? "", postFixup ? ""
+, shellHook ? ""
 , coreSetup ? false # Use only core packages to build Setup.hs.
 , useCpphs ? false
 } @ args:
@@ -279,6 +280,7 @@ stdenv.mkDerivation ({
         export NIX_${ghcCommandCaps}PKG="${ghcEnv}/bin/${ghcCommand}-pkg"
         export NIX_${ghcCommandCaps}_DOCDIR="${ghcEnv}/share/doc/ghc/html"
         export NIX_${ghcCommandCaps}_LIBDIR="${ghcEnv}/lib/${ghcEnv.name}"
+        ${shellHook}
       '';
     };