diff --git a/grammars.nix b/grammars.nix
index 7436389..59223bc 100644
--- a/grammars.nix
+++ b/grammars.nix
@@ -90,7 +90,7 @@ let
         fi
 
         $CC -c src/parser.c -o parser.o $FLAGS
-        $CXX -shared -install_name $out/$NAME.so -o $NAME.so *.o
+        $CXX -shared${lib.optionalString stdenv.isDarwin " -install_name $out/$NAME.so"} -o $NAME.so *.o
 
         runHook postBuild
       '';