diff --git a/flake.nix b/flake.nix
index 29699b9..8856430 100644
--- a/flake.nix
+++ b/flake.nix
@@ -44,12 +44,13 @@
                 || pkgs.lib.hasSuffix ".js" path);
         };
         v8Archive = pkgs.fetchurl {
-          url = "https://github.com/denoland/rusty_v8/releases/download/v150.4.0/librusty_v8_release_${pkgs.stdenv.hostPlatform.rust.rustcTarget}.a.gz";
+          # deno_core enables rusty_v8's simdutf feature.
+          url = "https://github.com/denoland/rusty_v8/releases/download/v150.4.0/librusty_v8_simdutf_release_${pkgs.stdenv.hostPlatform.rust.rustcTarget}.a.gz";
           hash = {
-            x86_64-linux = "sha256-WGn9twcbHyHyAKl86X0gElh34PMc2ALtmd4sU/SIsGw=";
-            aarch64-linux = "sha256-txd9Uq0zNycv4NO453gjnIIalcJdWVnexiue/WVPfdM=";
-            x86_64-darwin = "sha256-5ex9E/kUgT6/IB1Ee/j9J2h7exkuFsR/KCb+VBUXHyk=";
-            aarch64-darwin = "sha256-zNj4FIW4IsWxiuun+d65KaM4LYasZzu/DzZvBod+axA=";
+            x86_64-linux = "sha256-9IdiyhDR8fxgWkQcWuQw7Izh6egPFNePvELLh4wwtHY=";
+            aarch64-linux = "sha256-U54oOBWjlqV5bzKFi0LlF7hY66rqqtBdAykO6MhkpSc=";
+            x86_64-darwin = "sha256-p1AnH+xrIRRX7Qpc99LqsZJLJlYhqC2oarlZ1v8II+Q=";
+            aarch64-darwin = "sha256-Wu/9jVoMG3msHXCvg9WxkJllX9nGRaeU3EPxAfd5g4w=";
           }.${system};
         };
         common = {