diff --git a/pkgs/development/libraries/xml-tooling-c/default.nix b/pkgs/development/libraries/xml-tooling-c/default.nix
index dcd35d187f9..b1ae52a8c77 100644
--- a/pkgs/development/libraries/xml-tooling-c/default.nix
+++ b/pkgs/development/libraries/xml-tooling-c/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ boost curl openssl log4shib xercesc xml-security-c ];
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
-  env.NIX_CFLAGS_COMPILE = toString [ "-std=c++14" ];
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.isDarwin) "-std=c++14";
 
   enableParallelBuilding = true;