diff --git a/pkgs/development/libraries/shibboleth-sp/default.nix b/pkgs/development/libraries/shibboleth-sp/default.nix
index 84a165956d9..964d15e9546 100644
--- a/pkgs/development/libraries/shibboleth-sp/default.nix
+++ b/pkgs/development/libraries/shibboleth-sp/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     "--with-fastcgi"
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString [ "-std=c++14" ];
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.isDarwin) "-std=c++14";
 
   enableParallelBuilding = true;