From b31082d24636e7ebeeb8a0138af40a86eda29fc4 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 10 Jan 2015 23:54:30 +0100
Subject: [PATCH] haskell-generic-builder: propagate build inputs only if we're
 building a library

---
 pkgs/development/haskell-modules/generic-builder.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 18b3a6af30b..96aa02155eb 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -88,8 +88,9 @@ stdenv.mkDerivation ({
 
   nativeBuildInputs = extraLibraries ++ buildTools ++
     optionals (pkgconfigDepends != []) ([pkgconfig] ++ pkgconfigDepends) ++
-    optionals doCheck testDepends;
-  propagatedNativeBuildInputs = buildDepends;
+    optionals doCheck testDepends ++
+    optionals (!hasActiveLibrary) buildDepends;
+  propagatedNativeBuildInputs = optionals hasActiveLibrary buildDepends;
 
   # GHC needs the locale configured during the Haddock phase.
   LANG = "en_US.UTF-8";