diff --git a/pkgs/games/quakespasm/vulkan.nix b/pkgs/games/quakespasm/vulkan.nix
index 50862be46bd3..e9786a001e3a 100644
--- a/pkgs/games/quakespasm/vulkan.nix
+++ b/pkgs/games/quakespasm/vulkan.nix
@@ -36,6 +36,10 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "prefix=$(out) bindir=$(out)/bin" ];
 
+  env = lib.optionalAttrs stdenv.isDarwin {
+    NIX_CFLAGS_COMPILE = "-Wno-error=unused-but-set-variable";
+  };
+
   postFixup = ''
     wrapProgram $out/bin/vkquake \
       --prefix LD_LIBRARY_PATH : ${vulkan-loader}/lib