The problems with vendored Cargo.lock to nixpkgs are discussed in the following issue, but for now it would be a good idea to allow such Cargo.lock to be updated with nix-update.
There are many projects, especially in python packages, that have no Cargo.lock, and we feel painful updating them for a while until the issue is resolved.
closes https://github.com/Mic92/nix-update/issues/164
The problems with vendored Cargo.lock to nixpkgs are discussed in the following issue, but for now it would be a good idea to allow such Cargo.lock to be updated with nix-update. There are many projects, especially in python packages, that have no Cargo.lock, and we feel painful updating them for a while until the issue is resolved.