From edef34445833e69ffcd0a9e1557bba3c61929b25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Josef=20Kemetm=C3=BCller?= <josef.kemetmueller@gmail.com>
Date: Mon, 12 Mar 2018 00:20:18 +0100
Subject: [PATCH] petsc: fix darwin build

---
 pkgs/development/libraries/science/math/petsc/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/libraries/science/math/petsc/default.nix b/pkgs/development/libraries/science/math/petsc/default.nix
index efedbe725af..e1ce4b49747 100644
--- a/pkgs/development/libraries/science/math/petsc/default.nix
+++ b/pkgs/development/libraries/science/math/petsc/default.nix
@@ -16,6 +16,11 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ blas gfortran.cc.lib liblapack python ];
 
+  prePatch = stdenv.lib.optionalString stdenv.isDarwin ''
+    substituteInPlace config/install.py \
+      --replace /usr/bin/install_name_tool install_name_tool
+  '';
+
   preConfigure = ''
     patchShebangs .
     configureFlagsArray=(