From 6fe751fb5c6c1c492c7d99a9007945f3f4c9a9e3 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 19 Aug 2017 17:20:39 +0200
Subject: ghcWithHoogle: deal gracefully with packages that have no haddockDir
 attribute

---
 pkgs/development/haskell-modules/hoogle.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'pkgs/development/haskell-modules/hoogle.nix')

diff --git a/pkgs/development/haskell-modules/hoogle.nix b/pkgs/development/haskell-modules/hoogle.nix
index a0057c141f2..38e8dfd24c4 100644
--- a/pkgs/development/haskell-modules/hoogle.nix
+++ b/pkgs/development/haskell-modules/hoogle.nix
@@ -87,7 +87,7 @@ stdenv.mkDerivation {
         ln -sfn ${el.haddockDir} "$out/share/doc/hoogle/${el.name}"
       '')
       (lib.filter (el: el.haddockDir != null)
-        (builtins.map (p: { haddockDir = p.haddockDir p;
+        (builtins.map (p: { haddockDir = if p ? haddockDir then p.haddockDir p else null;
                             name = p.pname; })
           docPackages))}
 
-- 
cgit 1.4.1