diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 8da6355e0016..ac0b2dd07f83 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -139,8 +139,9 @@ in
   };
 
   grpc = attrs: {
-  nativeBuildInputs = [ pkgconfig ];
+    nativeBuildInputs = [ pkgconfig ];
     buildInputs = [ openssl ];
+    NIX_CFLAGS_COMPILE = [ "-Wno-error=stringop-overflow" "-Wno-error=implicit-fallthrough" ];
   };
 
   hitimes = attrs: {