From e202018d1fee2222bccd6099f9f9ac0998609360 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 18 Feb 2018 10:13:05 +0100
Subject: [PATCH] glm: only override to gcc6 if using gcc by default

Otherwise we have a regression on Darwin.
---
 pkgs/top-level/all-packages.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b129edb97512..dcbbfa3b5355 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8783,9 +8783,9 @@ with pkgs;
     glibc32 = pkgsi686Linux.glibc;
   };
 
-  glm = callPackage ../development/libraries/glm {
-    stdenv = overrideCC stdenv gcc6; # maybe a hack
-  };
+  glm = callPackage ../development/libraries/glm
+    (lib.optionalAttrs stdenv.cc.isGNU { stdenv = overrideCC stdenv gcc6;/*maybe a hack*/ });
+
   glm_0954 = callPackage ../development/libraries/glm/0954.nix { };
 
   globalplatform = callPackage ../development/libraries/globalplatform { };