From 6b3fd7e4750ec839bab6fed1ad80254d79de9ba1 Mon Sep 17 00:00:00 2001
From: Jiuyang Liu <liu@jiuyang.me>
Date: Sun, 21 Jul 2024 15:41:01 +0800
Subject: [PATCH] [nix] draft vcs linking

---
 difftest/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/difftest/default.nix b/difftest/default.nix
index be024aa8d..5373baa35 100644
--- a/difftest/default.nix
+++ b/difftest/default.nix
@@ -8,9 +8,9 @@
 , rust-bindgen
 
 , verilator
-, verilated ? null
+, verilated ? ""
 
-, vcs-lib ? null
+, vcs-lib ? ""
 
 , cmake
 , clang-tools