From 6aa06a6699ce4bf6bf61605bdb44b2c4908a046f Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Fri, 23 Mar 2012 03:01:58 +0000
Subject: [PATCH] ghc-packages: Darwin's native readlink doesn't support -f

svn path=/nixpkgs/trunk/; revision=33366
---
 pkgs/development/compilers/ghc/wrapper.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/ghc/wrapper.nix b/pkgs/development/compilers/ghc/wrapper.nix
index b04cd18fb46..be27f98925e 100644
--- a/pkgs/development/compilers/ghc/wrapper.nix
+++ b/pkgs/development/compilers/ghc/wrapper.nix
@@ -1,4 +1,4 @@
-{stdenv, ghc, makeWrapper}:
+{stdenv, ghc, makeWrapper, coreutils}:
 
 stdenv.mkDerivation {
   name = "ghc-${ghc.version}-wrapper";
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
       case "\$arg" in
         -package-conf) ;;
         *)
-          CANONICALIZED="\$(readlink -f "\$arg")"
+          CANONICALIZED="\$(${stdenv.lib.optionalString stdenv.isDarwin "${coreutils}/bin/"}}readlink -f "\$arg")"
           GHC_PACKAGES_HASH["\$CANONICALIZED"]= ;;
       esac
     done