diff --git a/pkgs/development/libraries/aws-c-io/default.nix b/pkgs/development/libraries/aws-c-io/default.nix
index c93b2748a3e..eda87ba2c53 100644
--- a/pkgs/development/libraries/aws-c-io/default.nix
+++ b/pkgs/development/libraries/aws-c-io/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
     "-DCMAKE_MODULE_PATH=${aws-c-common}/lib/cmake"
   ];
 
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error";
+
   meta = with lib; {
     description = "AWS SDK for C module for IO and TLS";
     homepage = "https://github.com/awslabs/aws-c-io";