From ad15e4e8a0beb93ba5b79d64c9cd8b2ac25fde88 Mon Sep 17 00:00:00 2001
From: Mario Rodas <marsam@users.noreply.github.com>
Date: Mon, 6 Apr 2020 12:00:00 +0000
Subject: [PATCH] petsc: fix build on darwin

---
 pkgs/development/libraries/science/math/petsc/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/science/math/petsc/default.nix b/pkgs/development/libraries/science/math/petsc/default.nix
index 7b0b500d12d..911f0a1cf89 100644
--- a/pkgs/development/libraries/science/math/petsc/default.nix
+++ b/pkgs/development/libraries/science/math/petsc/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     configureFlagsArray=(
       $configureFlagsArray
       "--CC=$CC"
-      "--with-cxx=g++"
+      "--with-cxx=$CXX"
       "--with-fc=0"
       "--with-mpi=0"
       "--with-blas-lib=[${blas}/lib/libblas.a,${gfortran.cc.lib}/lib/libgfortran.a]"