Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: ergogen 0 -> 1
attrpath: ergogen
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] skipping because derivation has updateScript
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/7lsyyqg7w3nhk2mrhzjljmxxwz19bhh4-packages.json.drv
building '/nix/store/7lsyyqg7w3nhk2mrhzjljmxxwz19bhh4-packages.json.drv'...

Going to be running update for following packages:
 - ergogen-4.2.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - ergogen-4.2.1: UPDATING ...
 - ergogen-4.2.1: DONE.

Packages updated!

The diff was empty after rewrites.