diff --git a/pkgs/webview-ui/app/eslint.config.mjs b/pkgs/webview-ui/app/eslint.config.mjs
index df02ea988..858cc8fec 100644
--- a/pkgs/webview-ui/app/eslint.config.mjs
+++ b/pkgs/webview-ui/app/eslint.config.mjs
@@ -18,7 +18,7 @@ export default tseslint.config(
         },
       ],
       "tailwindcss/no-custom-classname": [
-        "warn",
+        "error",
         {
           callees: ["cx"],
           whitelist: ["material-icons"],
diff --git a/pkgs/webview-ui/flake-module.nix b/pkgs/webview-ui/flake-module.nix
index 697b89305..5b4e85805 100644
--- a/pkgs/webview-ui/flake-module.nix
+++ b/pkgs/webview-ui/flake-module.nix
@@ -35,7 +35,7 @@
       packages.webview-ui = pkgs.buildNpmPackage {
         pname = "clan-webview-ui";
         version = "0.0.1";
-
+        nodejs = pkgs.nodejs_20;
         src = ./app;
 
         npmDeps = pkgs.importNpmLock { npmRoot = ./app; };