From 23fb83b37ddc6a3cdfe3af50ad358cf040fea266 Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Tue, 27 May 2014 12:53:26 -0500
Subject: [PATCH] Correctly locate Haddocks in hoogle-local expression

On some versions of GHC, documentation is at, for example:

    LIB/share/doc/

In others, it is at:

    LIB/share/doc/x86_64-darwin-ghc7.6.3/

This change will pick up documentation first from the second location, then
from the first.
---
 pkgs/development/libraries/haskell/hoogle/local.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/haskell/hoogle/local.nix b/pkgs/development/libraries/haskell/hoogle/local.nix
index 20816d3b2f9..337cd4c8154 100644
--- a/pkgs/development/libraries/haskell/hoogle/local.nix
+++ b/pkgs/development/libraries/haskell/hoogle/local.nix
@@ -73,7 +73,8 @@ cabal.mkDerivation (self: rec {
 
     for i in $docPackages; do
         import_dbs $i/share/doc
-        ln -sf $i/share/doc/* $out/share/hoogle/doc
+        ln -sf $i/share/doc/*-ghc-*/* $out/share/hoogle/doc 2> /dev/null \
+            || ln -sf $i/share/doc/* $out/share/hoogle/doc
     done
 
     import_dbs ${self.ghc}/share/doc/ghc*/html/libraries