diff --git a/pkgs/by-name/co/cook-cli/package.nix b/pkgs/by-name/co/cook-cli/package.nix
index f15596b28d36..e441de418fe3 100644
--- a/pkgs/by-name/co/cook-cli/package.nix
+++ b/pkgs/by-name/co/cook-cli/package.nix
@@ -44,6 +44,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   preBuild = ''
     npm run build-css
+    npm run build-js
   '';
 
   meta = {