diff --git a/pkgs/by-name/pr/protoc-gen-es/package.nix b/pkgs/by-name/pr/protoc-gen-es/package.nix
index d75f34924852..240c5b833b43 100644
--- a/pkgs/by-name/pr/protoc-gen-es/package.nix
+++ b/pkgs/by-name/pr/protoc-gen-es/package.nix
@@ -32,6 +32,15 @@ buildNpmPackage rec {
   # 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/ts4.*
+    cp -rL node_modules/ts4.* $out/lib/node_modules/protobuf-es/node_modules/
+
+    rm -rf $out/lib/node_modules/protobuf-es/node_modules/ts5.*
+    cp -rL node_modules/ts5.* $out/lib/node_modules/protobuf-es/node_modules/
+
+    rm -rf $out/lib/node_modules/protobuf-es/node_modules/upstream-protobuf
+    cp -rL node_modules/upstream-protobuf $out/lib/node_modules/protobuf-es/node_modules/
+
     rm -rf $out/lib/node_modules/protobuf-es/node_modules/@bufbuild
     cp -rL node_modules/@bufbuild $out/lib/node_modules/protobuf-es/node_modules/
   '';