Does update-source-version have a generic --system flag?

I wanted to update the hash of the darwin in this PR: warp-terminal: added passthru update script by imadnyc · Pull Request #292928 · NixOS/nixpkgs · GitHub, but using update-source-version doesn’t seem to help. It seems to expect a system+architecture instead of just a generic system – is this something that should be changed or is this expected?