diff --git a/pkgs/by-name/pr/protoc-gen-es/package.nix b/pkgs/by-name/pr/protoc-gen-es/package.nix
index fe36c239a8a7..ada1eca94b36 100644
--- a/pkgs/by-name/pr/protoc-gen-es/package.nix
+++ b/pkgs/by-name/pr/protoc-gen-es/package.nix
@@ -29,6 +29,13 @@ buildNpmPackage rec {
     npm run --workspace=packages/protoplugin build
   '';
 
+  # copy npm workspace modules while properly resolving symlinks
+  # TODO: workaround can be removed once this is merged: https://github.com/NixOS/nixpkgs/pull/333759
+  postInstall = ''
+    rm -rf $out/lib/node_modules/protobuf-es/node_modules/@bufbuild
+    cp -rL node_modules/@bufbuild $out/lib/node_modules/protobuf-es/node_modules/
+  '';
+
   passthru.updateScript = ./update.sh;
 
   meta = with lib; {