From 77e2f28b45d5c7a9d742f2b153499230fb57c624 Mon Sep 17 00:00:00 2001
From: Yuri Aisaka <yuriaisaka@users.noreply.github.com>
Date: Tue, 13 Mar 2018 08:15:56 +0900
Subject: [PATCH] cpp-gsl: treat sign-conversion as warning (#36630)

---
 pkgs/development/libraries/cpp-gsl/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/libraries/cpp-gsl/default.nix b/pkgs/development/libraries/cpp-gsl/default.nix
index ecd86354ee8..833275c72bd 100644
--- a/pkgs/development/libraries/cpp-gsl/default.nix
+++ b/pkgs/development/libraries/cpp-gsl/default.nix
@@ -12,6 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "0h8py468bvxnydkjs352d7a9s8hk0ihc7msjkcnzj2d7nzp5nsc1";
   };
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=sign-conversion";
   nativeBuildInputs = [ cmake catch ];
 
   meta = with stdenv.lib; {