diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 1a1993aebee4..0fbab1540625 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -315,7 +315,7 @@ in
   };
 
   grpc = attrs: {
-    nativeBuildInputs = [ pkg-config ] ++ lib.optional stdenv.isDarwin libtool;
+    nativeBuildInputs = [ pkg-config ] ++ lib.optional stdenv.isDarwin cctools;
     buildInputs = [ openssl ];
     hardeningDisable = [ "format" ];
     NIX_CFLAGS_COMPILE = toString [